Restarting G6 sensors and transmitter

“10-day hard stop on G6 sensors.” – love, Dexcom

Did that one thing alone stop you from considering the G6?  Well, good news…you can actually restart the sensors (and the transmitter).

There are several ways to restart a G6 sensor, listed below from easiest to hardest. (Technically, Options 1 and 2 are so much easier than other options…that it’s almost not worth doing the others)

  1. Use the G6 receiver to restart
  2. Use the phone to restart (without receiver)
  3. Use the resetTransmitter app
  4. Remove the transmitter from the sensor

UPDATE:  It used to be that I thought that you could not restart a sensor if it had expired, without using Option 3 or 4…turns out this is not true!  If you accidentally did not remember to start and finish Options 1 or 2 before your sensor session expired, don’t fret.  I have used Option 1 to restart an ended sensor (basically just start on Step 4 of Option 1, but you don’t need to wait for a new BG to come in…because the session has expired).  I haven’t personally tested how Option 2 would work in that situation, but it should work just the same.

However, do not end up in limbo…don’t start a restart process an hour before a session ends.  Either start/finish Option 1 or 2 far enough in advance that you can complete the restart entirely…or wait until the session has ended and then begin a restart.  The in-between process doesn’t work well, so pick a version and follow-through.

Option 1: Use G6 receiver

This is the easiest and preferred method because you don’t have to lose BG data during the restart process.  You can just keep looping (if you are a looper) and watching BG data on your phone, Nightscout, and Follow apps the whole time.

To use this process, you do NOT have to be using a receiver on a regular basis.  We only pull the receiver out in order to do the restarts.  Normally, it sits in the closet, turned off, between session restarts.  I think of the receiver as a magic restart wand that we pull out of the closet every so often.

We start and finish this whole process before the session is due to expire…so about 3 hours before the end of session, or sooner, we start the receiver going on the steps below.

  1. In your Alerts settings for the receiver, it’s a good idea to turn off the “signal loss” alert during this process.  Your receiver is going to have signal loss for two hours and it would be annoying to hear that alert for the whole time.  Just a good idea before you get started.
  2. If you don’t normally use the receiver, go ahead and turn it on.  Get the receiver connected with the transmitter.  Shortly after (about 5 minutes) the receiver connects, the receiver will start reading BGs from the existing session already going on the phone.
  3. Watch the receiver get a fresh BG value.  Usually this happens just seconds after the phone app gets a new BG.  During this process, the transmitter and receiver briefly talk and then disconnect from each other for the next 5 minutes.  We are going to use that disconnected state to our advantage to restart the sensor.
  4. Wait about 15 seconds or so after the new BG value came in and then press the “Stop Sensor” option ON THE RECEIVER (not on the phone).  You’ll be told “Are you sure you want to stop your sensor?  It cannot be restarted, a new sensor is required.”  Answer Yes.  You’ll see a little progress bar go by for stopping sensor.
  5. On the screen that appears after the progress bar, press New Sensor.  You’ll be promoted to choose between “No Code” or “Enter Code”.  You can choose either.  If you choose to “Enter Code”, go find your code from when you originally inserted the sensor (the one printed on the adhesive cover of the sensor).  Contrary to early rumors, not all the sensors in a box have the same code. That code is the calibration code for the particular sensor wire that sensor is using.  If you don’t have that code saved, go ahead and choose “No Code” (don’t just randomly use the code from a different sensor in your supplies).
  6. After you finish with the Code entry decisions, you’ll need to press the “Start Sensor” button that will appear on the receiver.  You’ll see a “starting sensor” progress bar for a few seconds and then the 2-hour sensor warmup countdown circle will be displayed on the receiver.
  7. From this point forward for at least two hours…you need the receiver to NOT COME INTO COMMUNICATION WITH THE TRANSMITTER.  There are several ways to do this, some ideas:
    • Put the receiver in the microwave.  The microwave blocks the communications between the receiver and the transmitter very effectively, just make sure you don’t turn on the microwave during the 2+ hours you’re waiting, or
    • Put the receiver in a faraday bag (costs less than $10 and it can act just like the microwave, but a lot more portable and easy to manage), or
    • Put the receiver “far enough away” that it stays out of range of the transmitter.  Neighbor’s house, the corner of your backyard, etc.  Just so long as it is far enough away that the transmitter and receiver won’t accidentally talk to each other during the 2+ hours of waiting.  This is the second most common failure point for people trying to restart…they do not adequately keep the receiver from communicating with the transmitter during this 2 hour wait.  I highly recommend using a microwave or a faraday bag for this option to prevent accidental communication.
  8. During this 2+ hours of waiting, the receiver will have “signal loss” and “no data” message.  That’s a good thing.  Don’t worry about that. You want that.
    • Also during this 2+ hours of waiting, you’ll have BGs on the phone app uninterrupted.  Your Nightscout site, dexcom follow app, dexcom G6 app, and Loop app (if you use it) will all continue to work as usual.
  9. After waiting 2+ hours at least (I usually go at least 2 hours and 10 minutes just in case), bring the receiver back into communications with the transmitter.  Within 5 minutes, the “no data” message will be replaced with a warmup message when the receiver will connect with the transmitter again.  The warmup circle looks like a 3/4 completed warmup circle, but don’t worry, it only has 5 minutes until you’re session is ready to start again.
  10. 5 minutes after the warmup circle appears, the receiver and phone will start showing BGs again for the newly restarted session (or the “enter 2 calibrations” request if you chose a “no code” session or used a reset transmitter).
  11. If required, enter the calibrations in both the phone and receiver at the same time.  If your session did not require immediate calibrations to start the session, it is still not a bad idea to check and make sure you’ve restarted BGs at a reasonable value.
  12. Congrats, you’ve just restarted your G6 sensor session.  Your newly started session will expire 10 days from the time that you did Step 5, so plan ahead if you are going to do any subsequent restarts.

Here’s the video for the G6 Option 1

Option 2: No-receiver restart

For non-US residents, sometimes you can purchase the G6 system without the receiver.  So while you can still restart the sensor session without it, the disadvantage (vs. using Option 1) is that you will not see BGs for two hours during the restart process.

This process can be a little more prone to errors if using an android phone…some android phones reconnect with BT devices pretty aggressively I’ve heard.

Remember to start this process far enough in advance that you will finish it before the “Sensor Expires” time.

SIDE NOTE:  I have heard from several t-slim users that this method does indeed work to restart the G6 for those users.

  1. In phone’s bluetooth list (in iPhone Settings), “forget” the Dexcom transmitter ID.  In fact, “forget” all your old Dexcom transmitters if you don’t regularly delete them.  Old ones don’t need to be saved.  By forgetting the Dexcom transmitter, we are preventing the transmitter and app communications during the restart process…and that’s a good thing.  We don’t want them paired during the 2 hours.
  2. Go to G6 app on the phone and “stop sensor” from the Settings menu. You’ll be told “Are you sure you want to stop your sensor?  It cannot be restarted, a new sensor is required.”  Answer Yes.
  3. On the screen that appears after, press “New Sensor”.  You’ll be promoted to choose between “No Code” or “Enter Code”.  You can choose either.  If you choose to “Enter Code”, go find your code from when you originally inserted the sensor (the one printed on the adhesive cover of the sensor).  That code is the calibration code for the particular sensor wire that sensor is using.  If you don’t have that code saved, go ahead and choose “No Code” (don’t just randomly use the code from a different sensor in your supplies).
  4. After you finish with the Code entry decisions, you’ll need to press the “Start Sensor” button that will waiting on the app’s main screen.  You’ll see a “starting sensor” progress bar for a few seconds and then the 2-hour sensor warmup countdown circle will be displayed on the phone.
  5. Wait at least 2 hours, but not so long that the old sensor session will expire during your wait.  If the old session expires before you finish the remaining steps…you’ll have to move onto Option 3 or 4 (or replace the sensor).
  6. Your G6 app will also display “signal loss” during this time.  That’s good, too.  You want the transmitter to stay unpaired and “lost” during the warmup wait.
  7. After the 2 hour wait, restart the phone (hold down the power button and slide to turn off the phone).  Open G6 app. This will trigger the phone to try to re-pair with transmitter.  Accept the pairing request now that you’ve waited at least 2 hours.  If you don’t get a pairing request within 5 minutes of the restart, you may need to restart the phone one more time.
  8. About 5 minutes after accepting the pairing request, you’ll be greeted with BGs again for the newly restarted session (or the “enter 2 calibrations” request if you chose a “no code” session or use a reset transmitter).  If prompted, enter the calibrations and you’re good to go.

Option 3: Reset Transmitter

This option resets the day-counter that the transmitter holds internally.  You know how the dexcom transmitter stops working at 112 days?  Well, this process resets that counter to zero and in the process will allow you to start a new session.  HOWEVER, it is a process to unpair-pair-unpair-pair the transmitter several times so, I’d recommend still using Option 1 or 2 above for regular sensor restarts.  Come back to these directions when you simply need to extend that 112 days.  Since it does work to allow a sensor restart…I’ll leave it here for the purposes of complete discussion of alternatives.

  1. Build the ResetTransmitter app as described in my blog post here.
  2. Make sure your G6 session has ended.  You cannot be in an active session for a transmitter reset.
  3. Go to your iPhone’s Bluetooth area (in Settings) and “forget” the Dexcom transmitter.
  4. Delete the Dexcom G6 app.
  5. Shutdown and restart your iPhone.
  6. Open the ResetTransmitter app and enter your dexcom transmitter ID and press the Reset button.  Within 5 minutes you should get a pairing request to accept.  The reset success message will appear within a very short time after the pairing is accepted.
  7. IF you don’t get a pairing request within 5 minutes in Step 6, restart the phone again.  Double check all the dexcom transmitters have been deleted from the bluetooth list on the phone.  Open the ResetTransmitter app again and see if you get a pairing request within 5 minutes.  (The toughest part of this process is getting the transmitter to successfully unpair and re-pair between apps.  Sometimes it takes a few restarts and patience…but it does work eventually.)
  8. After the transmitter has been reset, you can reverse the process.  Forget the Dexcom transmitter again from Bluetooth list, restart the phone.  Reinstall the G6 app and go through the setup screens as if you were starting a new sensor.  It won’t matter if you use a code or no-code session, as you will definitely be prompted for calibrations for any session after resetting the transmitter.  Once you get a successful pairing established, you can press the start session on your app.

Option 4: Remove the transmitter

The G6 transmitter is surrounded by plastic entirely.  The locking wings for the transmitter are located under and inside the plastic ring surrounding the transmitter, making them very inaccessible by fingers.  Therefore, popping out the G6 transmitter is a bit cumbersome, requires some small pointy tool, and frankly would be a little hard to do if your sensor is in an awkward spot to reach.  I managed to do it with a simple tool by myself with the sensor on my arm (see video below), so it’s not impossible.

Technically, if you remove the transmitter, you can replace it back onto the same sensor (and tape it back down so it stays locked in place, if you’ve busted the hinge point in the process of removing the transmitter).  This would allow you to restart a sensor session on the same sensor.  I’ve heard from others that leaving it out for 15 minutes helps restarts…but I have not experienced the same.

I’m only mentioning this option for full disclosure of ALL the options…but really this shouldn’t be used.  It’s so much easier to use one of the first two options.

Video of how to remove the transmitter:

Restarting G6 Transmitter (avoid the 90-112 days Dexcom shut down)

The Dexcom G6 transmitter is just like the G5 transmitter in that Dexcom artificially kills the transmitter by 112 days of use after first activation.  If you’d like to use the transmitter beyond the 112 days, and instead use the transmitter until the end of its battery life, you can use the same process described in my G5-reset-transmitter post.  The G6 transmitter can be reset at any time just like the G5 transmitters.

91 thoughts on “Restarting G6 sensors and transmitter”

  1. Hi Katie,
    Thank you for this and your other very interesting and informative posts.
    Have you managed to make a G6 sensor last 2o days?
    I self fund and this would make it a practical proposition for me. At the moment I use a G4 & get around 18 to 23 days.
    Using these methods do you still have “no calibration” for the first 10 days.

    1. How long a sensor will go will be dependent on the person more than anything. If you get 18-20 days on g4 now, I would expect similar with g6. Only the first 10 days are officially tested/advertised as “no calibration”. After that you will get calibration notices. You can choose to ignore them or not…the session will keep going. How well the g6 holds calibration on its own after 10 days has yet to be tested.

  2. Thank you for this so much, I have insurance but my part I have to pay is a lot
    I have been wearing the G5 3 to 4 weeks, and it has helped a lot with costs.
    I will be giving this a try
    Shari Rogers

  3. First – THANK YOU so much for your detailed and well written article. I’m sharing it every chance I get 🙂

    Now I do have a question – which really may be more of a curiosity since all of this is still pretty new … It relates to sensors that have the same code – I have 2 in my first box that do. This makes sense based on what you said about the factory calibration codes being matched to the wires. They can use one lot of wire in creating multiple sensors and so – in theory – there could be hundreds of sensors out there with the same codes.

    So let’s assume that I DO actually change the sensor and that I choose the one that has the same code as the first one I used. Let’s say I didn’t notice (or remember) that it had the same code. So now I’m using a new sensor but with the same code – how does the system know that it’s a new sensor so as to not prompt for calibrations?

    Along those lines but from the flip side – if I DON’T actually change the sensor but use the same code on a restart – how does the system know it’s NOT a new sensor in order to prompt for calibrations?

    I don’t mind the calibrations horribly so I will do the restart at day 10 regardless, but this is the kind of thing that just tickles my brain and makes me question “why” and “how” 🙂

    1. As an update… Still kinda wondering the how and why, but I did a restart on Friday the 15th, using this article and a Faraday bag. Completed at 11am and have had no calibration requests since then – so today is day 16 on the same sensor.

      I’ve been doing fingersticks periodically – without entering as a calibration – and it’s maintaining its accuracy so far. I’m optimistic

      1. I’ve successfully restarted my G6 sensor using Option 1 above. Went to do it yesterday but got too close to that two-hour shutdown window. So when I couldn’t restart from the remote, I simply did what you asked about above. Told my phone I’d inserted a new sensor, used the same number, and it’s working perfectly. No calibrations, no fuss!

        1. Yes! Just had occassion to stumble upon testing this fact for a brand new sensor that dexcom told me was reused (it wasn’t). So, going to edit this post to clarify…you can restart an expired session. BUT, you do need to let it expire and THEN start the receiver session…then it works great!

  4. aha! but you can shutdown the dexcom receiver for 2 hours -what do you think -easier than storing at your neighbors

  5. Started a new sensor this morning, following the instructions to the letter (Using the receiver only method). When I took my receiver out, it said that it was only 30 minutes into the warm-up, but it was actually closer to 2 hours, 15 minutes. I assumed the process failed and just shut down the receiver.
    I looked at my phone about 30 minutes later, after it was due to expire, and was surprised that I was still getting readings. I looked at the settings, and it said that it was inserted at the new time (when I hit the restart sensor on the receiver), and is now due to expire in 10 days!!! Biggest point: No calibration requested!!!!

    1. Update: It has been over 25 hours since my restart, and I have yet to receive a single calibration request, nor have I entered one. I would love to figure out what I did to make this work.
      I hit stop sensor on the receiver, then hit restart, and placed it in a Faraday bag. I took it out over2 hours later, and it still was on the warm up, saying only 30 minutes in. I then powered down the receiver.
      One note: When I first inserted the sensor, I used only the phone. I turned on the receiver several days later, then turned it back off again. I never entered the code into the receiver, UNTIL I RESTARTED.
      Hope this helps!

      1. I’m not getting prompts either after sensor restart. I entered the same sensor code that I originally started my first session on the g6 receiver with. So I am not sure why I am not getting the prompt for calibrations as the article says we should get. I introduced the phone to the transmitter after about an hour after the sensor warmup was running on the first session.

        Hopefully it keeps rocking.

      2. If the receiver hadn’t already had the transmitter in it before…you can restart without calibration requests, I’ve discovered. We have one receiver that has bounced between two transmitters. By pairing with the other transmitter B and getting a reading from that transmitter first, I can then finish the restart with the other transmitter A without calibrations (does require changing the transmitter ID in the receiver before starting the new session). Haven’t been able to reproduce this on a single transmitter past the first restart. Let me know if you are able to restart a second time without calibrations.

        1. So how would you modify the process (overall) for Option 1, to end up with a no-calibration second 10-day session with a sensor? Do initial insertion with phone only… and then? Turn off phone, use receiver for restart process somehow? [We’re only 2 days into our G6 for our little guy, and they forgot to send sensor, so we’re still figuring this out… and thanks for doing this diligence!!]

          1. The only way I have gotten a no-calibration restart was when I had the receiver paired with a different G6 transmitter immediately prior to using it to restart another one. But, not many people have two transmitters going to do that process at any one time. 😉

        2. I have only used one transmitter, and as mentioned above, I was able to restart without the need for calibrations. Of note, I never paired the receiver with the sensor. I only paired the sensor with my iPhone.
          I am only into day 3 of my current new sensor, but will try again! I know there is a trick to this, and one of us with isolate the process.

          1. awesome…i’m sure it’s just a matter of playing around with a bit more like you say…

          2. OK. I just did another restart and no calibration requests were required. I carefully documented each step. One important note: I have no idea if steps 11, 12 or 13 are actually all required, or if one or two of them are. This is the way I did it, and it worked.

            Initial start (new sensor)
            1. Shutdown Receiver. Store it safely away somewhere for the next 10 days
            2. Pair and insert a new sensor using iPhone only. SAVE THE CODE FOR FUTURE REFERENCE.

            Time of Restart:
            1. Begin restart process well more than 2 hours before sensor expires (I did mine 12 hours earlier)
            2. Use ONLY the receiver. You may look at the readings on your iPhone, but otherwise enter nothing on it.
            3. Turn on the receiver and wait for it to get a fresh BG value. It will get one even if never paired with the sensor currently in use.
            4. Press “Stop Sensor” on the receiver
            5. Press “New Sensor”
            6. Enter the ORIGINAL sensor code from 10 days earlier.
            7. Press “Start Sensor” and wait for warm-up screen.
            8. Immediately put the receiver in a Faraday bag.
            9. After waiting at least 2+ hours, take the receiver out of the Faraday bag. Your should see a “Signal loss” message.
            10. After a few minutes, the receiver will show the warm up screen, but should only be 30 minutes into it. No, I do not know why. But this is consistent on both my attempts.
            11. Put the receiver back in the bag and wait at least 5 more minutes.
            12. Take the receiver back out of the bag, see that it is still in warm up mode, and IMMEDIATELY shut it down
            13. Wait several minutes and turn the receiver back on.
            14. Wait for the receiver to get a glucose reading.
            15. Once a reading is obtained, the iPhone should show a new sensor insert time of now.

    1. I have not been able to successfully restart with only the receiver. I even tried removing transmitter & restarting that way 🙁

  6. What do you do if you use the tslim pump that connects to the dexcom? Would you put the pump into the microwave for 2+ hours?

    1. What seems to matter is to prevent communication between *transmitter* and one receiver (or smart device, or pump).

      G6 isn’t yet integrated with Tandem x2 (but will be in Aug 2018 – next month).

      It’ll be fun to see how long G6 remains accurate “in the field” separate from official FDA studies. Of course, we should also share any negative outcomes from our extended wear – if any (infection, scarring that affects later use of pump and/or CGM use.

      I continue to use my arms for G6.

      1. My Dr and I have discussed the extended wear of G4,5 or 6. Her thoughts are that the Dexcom products are not injecting anything into your body and they should be fine. As long as your results are good. My G5s would normally work for around 21 days. The biggest problem is the tape that they use. I have solved this by using an IV Prep pad to help it stick. You can not use it where the wire goes in.

          1. I have some samples..they do work well…but unable to find where to get more..don’t see them on the Dexcom site. Any suggestions, please?

  7. With the upcoming integration of the TSlim X2 Pump, would you expect Option 1 to work the same, but substitute the pump for the receiver?

    Does Option 1 work if you reverse the phone and receiver?

    1. Not yet, to my knowledge…but I’m not an android user. I believe x-drip+ app would have it some day, if not already?

  8. Or if you’re using xDrip+ instead of the official app that restarts it automatically after 6 days (default option but can be turned off)

  9. Hey I just successful reset my Dexcom G6 Thanks so much for this info I am sending so many others your way! What is your YouTube channel info please can’t wait to join it!!!!!

  10. Hi Katiedis. What a great post. Well done for the research into the fix. Just 2 questions…

    Do you know if the option 1 and 2 work with Android devices running the Dexcom app? Android restarts are also slightly different not using power and slide keys…

    Your fantastic ‘restart transmitter’ app – is there anyone who has developed an Android equivalent??

    Thanks again for a well researched post

  11. Did Option 1 today this today for the first time. Worked perfectly! I only use the phone and dexcom app for my daughters readings. But we keep the receiver on hand as a backup.

    A couple of notes from my restart.

    1. The receiver has been paired with this transmitter previously. However, not with the sensor I used it to restart. And am not getting requests for calibrations!!!

    2. When I took the receiver out of the microwave 3 hours later, I also got the no signal error. Within 5 minutes of being out of the microwave, the receiver showed “sensor warmup” and was only about 30 minutes complete. – I was certainly worried at this point. I did not do anything at this stage but wait. But within 5 more minutes, it was getting BG readings with no calibration request.

    3. The final check in settings, sensor info… insertion time was today with 10 more days to expiration!

    I just turned the receiver off and will not use it for anything until the next restart needed.

    Thank you for this! This is amazing. Mostly because I usually run out of sensors before I can get my daughters prescription refilled, so getting a few more days out of each sensor is a God send to deal with the Drxcom reorder lag time!

  12. This is fantastic – especially useful for those on the new Dexcom subscription model where a sensor HAS to last for 10 days – I had one fall off on day 7 and am now extending my next one to 13 (and maybe more!) days.

    Great website and excellent guide – thank you

  13. Hi! Anyone have any advice for trying option 2 with a samsung s6? We tried unpairing the transmitter and ended up with having to contact dexcom to get it repaired. Can we just shut the bluetooth off for 2 hrs? We self pay and this new g6 is killing us! Thanks in advance!

    1. I have a G7. Option #2 worked flawlessly my first try. The second time… I think I had the same issue as you and Dexcom sent me a new transmitter and sensor.

      I think the issues is that we no longer have the forget Bluetooth device option. Next time I try, I will just turn Bluetooth off for the warm-up.

  14. Strange…..i restarted my G6 for the second time today…..did enter the number code….last week….even with the code….it asked for calibrations and had the blood drop on the screen the whole time….today after it restarted….no blood drop…and no calibration request….and it is spot on…..go figure….(is it going to surprise me and stop later on it’s own????)…I use the signal preventing bag for the time away from the sensor…..CURIOUS….I am used to a weekly restart…and wanted to get 21 days…out on one sensor….so respond….if you have any new information….

  15. It works!! I was so pleased. My next batch of sensors is late due to a change in insurance, but now I have another 10 days (at least) to go. Thank you for figuring this out, writing such clear instructions, and sharing.

    1. I appreciate that other G6 users are working diligently (and sharing the info!) to extend the G6 sensors and transmitters. I just upgraded to G6 yesterday and was incredibly disappointed with the 10-day hard shutdown. Now I’m overwhelmed by all of these options and the amount of TIME you have to invest in more testing, practicing, comparing, etc. on top of all the other T1 stuff. And still risk bad readings on the G6…

      Aaarggghh!!!! Too old for this sh*t!!!

  16. Hi all,

    Thanks for this blogpost! I will use the G6 without the device, just xDrip+.
    Does anybody has experience with restarting Sensor and Transmitter only with xDrip+? How does this work and how is the workflow?

    Thank you, Bastian

  17. Thanks for all the info. I just got the G6 last week. I do not use the iPhone app to monitor my blood sugars and only use the receiver. Today I attempted to restart my sensor, at 9 days, and followed all the instructions for the first option. After waiting 3 hours, and not having the receiver and transmitter communicate, I received the warm up. After a few minutes I received the, “Replace Sensor Now” screen and not the calibration option. Have you seen or heard this happen before?

  18. Hi everyone,

    I just completed the reset instructions for the Dexcom G6 using just the receiver placed in the microwave as instructed. It worked perfectly! There was no need to shutdown the receiver. The sensor continued to take glucose readings during the 2 hours in the microwave and displayed them once the receiver and transmitter were reconnected. No calibration was necessary although I would still recommend it after the initial reset. I started the process 4 hours prior to the sensor expiration time. Separating the transmitter from the receiver and completing the entire process before the sensor expiration time is the key!

    Thank you for all the amazing people providing their experiences. A special thank you to Katie for the easy to follow instructions and YouTube video.

  19. I was able to pry the transmitter out and restart the sensor on my daughter!

    When you pry the transmitter out in your video, you go from the top requiring the transmitter to be taped down when putting back in. I used a tiny thin knife from the bottom side of the sensor casing and was able to fairly easily pry the transmitter out with out breaking the sensor casing and then reinsert the transmitter locking back it to place just like new! It worked!!

    Thank you so much for this idea!

  20. So I messed up the timing to restart my sensor before it told me it was time. On my phone, I simply entered the code from the one already inserted. Waited through the 2-hour warm up and it’s fine. No calibrations required, accurate when I check it.

    I’d previously used Option 1 with success, which is nice since you don’t lose the 2 hours. But simply restarting and reusing the code seems awfully simple.

  21. Thank you for the instructions. This is great. Just one comment, my sensor session had expired before realizing these instructions existed and ended up blindly following Option 2 re-posted to another site. I am happy to say that it worked! Although, I did have to calibrate.

    1. I actually just posted a new blog post that stumbled onto that fact…you can restart an expired session! Going to edit this post to reflec that new nugget

      1. We’re new users, 3rd sensor, but something didn’t go right and it didn’t start up. Transmitter says “no Sensor”, yet my husband has it inserted. We’ve tried a lot of things, but does the sensor have to be “active” to do the procedures you have outlined? Or is it dead and gone, even tho not really used. I’m trying to understand how to revive it. Thanks.

  22. I’m on my first G6 now, just switched from an Enlite. I managed to do something without having read any of this info, and basically did Option 1, doing calibrations for the past 10 days. I let this session go all the way to 10 full days…and have not been able to do anything (including option 4, but not option 3, since I’m just using the receiver for now) to get the receiver to accept the sensor. Im getting “No Restarts” alarms. Is this only going to work once, for two 10-day sessions? How can I extend the sensor for longer? Since I’m coming from the Enlite, I kind of expect the sensor and transmitter to last about the same length of time before a recharge (I could only get 7 days because the Enlite was so irritating to my skin and lost most of its accurracy by the time the transmitter needed a charge), so I was hoping to get in 3 10-day sessions now. Impossible?

  23. If you don’t want to use the microwave or a faraday bag, a soup can and and a piece of foil (Or just some heavy duty foil) should work (according to my husband the radio expert). I’m going to try it on my next sensor. Essentially, if you put the receiver in the can and cover the top very tightly with foil or wrap the receiver in a large pocket of tightly sealed foil (leave some air space inside the foil packet so the receive doesn’t get too hot). This should prevent any bluetooth communication between the transmitter and receiver and allow you to keep your receiver close by (for this who live in apartments or when outdoors is not an option due to weather). Anyone try this yet?

    1. I’ve had varying success with anything tinfoil related. Better to get a metal tin cookie can with the lid than the tinfoil. I’ve had 2 out of 3 tinfoil experiments end in unexpected “breakthrough” communication between receiver and transmitter. If I were ever in a situation where tinfoil was my option…I’d probably instead choose to just leave the receiver “far enough away” for the two hours as opposed to close by and wrapped in tinfoil.

  24. Hello Katie,

    I tried logging into your blog yesterday and for some reason it did not work. I also would like to see a video of option 2.


  25. Thanks for this we have receiver and phone… we started both up with sensor code etc BUT how does the restarting just the receiver make the phone forget when it was started up?? I’m nervous after the 10 day expiry the phone will give up and will just be left with receiver and no share

  26. Thanks so much for the tutorial. I followed option 1 and it worked. But, I still don’t have an arrow on the BG reading, some 10-15 minutes later. It is stuck at 103 the number that first came up when the warm up ended. What do I do now…?

  27. Hi Katie,
    I tried option 1 with no success. I waited for a new 5 minute refresh and missed a couple. Instead I put the receiver in the micro for 10 minutes. When I took it out, it had signal loss, of course. I waited 5 minutes and took it out. Waited another 20 seconds and did the restart procedure. Immediately placed the receiver in the micro for 2.5 hours. When I took it out, it gave me the dreaded – cannot restart. Where did I go wrong.


  28. Hi Katie!

    Thanks, as usual, for this great tutorial. Question: If we’re using a t:slim X2 pump and the pump is our Dexcom G6 receiver, can we still do a restart on the phone? Or would this require some extra effort? Thanks in advance!

  29. So I’m in a bit of pickle. I did option 2 incorrectly. I stopped the sensor before I did the “forget Dexcom” step in the bluetooth settings. So option 2 didn’t work for me because I did the steps backwards. So now I opted for option 4. I was able to get the transmitter out with damaging the sensor too badly but it’s still saying “no restarts” when I try to set it back up again.

    Option 4 worked for me a few weeks ago when I had my first 10 day session had expired.

    I’m working on an insurance issue right now with Dexcom and Blue Cross Blue Shield and I’m on my last sensor. If I can’t get this sensor to work for a few days I do have a couple of g4/g5 sensors that Dexcom had sent me by mistake. Will those work with G6 transmitter?

  30. Hi, thanks so much for your hard work on this, I have had mixed success with G6 so far- my first one was way out so gotvit replaces on day 8, my second one I successfully restarted ( iPhone only) but by 3 days in I have been getting gaps and ‘sensor problem wait up to 3 hours’
    I’ve had calibration requests, and given it the calibrations, but four days short of my second set of 10 days I think I’m going to have to give up and put a new sensor in. Shame, I was hoping they would last as long as G5 on me, 21 to 28 days! I will go back to using my arm I think.

  31. If you use option 4 do you still have to go through the process of option 2 after you put the transmitter back in?

    1. You should not have to, no. Should be able to just start as normal. However, Option 2 has some checks that the app does to look for signs of trauma that could hinder a normal start. See my blog post about “but I wasn’t restarting…why the error”

  32. I attempted to use option 1. After restarting the sensor, I placed the receiver in a faraday bag. However, when I looked at my Galaxy S9+ phone, the sensor was in the 2-hour warm-up phase. It seems that when I stopped the sensor on the receiver, it also stopped on my phone. I eventually was able to restart it later that evening, but lost a day of readings and had to finger-stick.

    Should I close the bluetooth on my phone to avoid the the next time I attempt to restart? Another other thoughts on how to avoid my phone resetting as well as the receiver?

    1. Should not have to shut down bt on the phone, no. However…it is of UTMOST importance to keep the receiver and transmitter from talking to each other as soon as you’ve pressed the “stop session” command. The ways of doing that are with a faraday bag, metal box, microwave, or physical distance. Perhaps try doubling up on your shielding…faraday bag in a microwave? There are leaky bags and leaky microwaves. Some faraday bags have two pockets and only one is shielded. And some “faraday” bags are really only weak rf-shields and not true faraday bags. The ones I’ve linked are proven to work for us. You also have to make sure that you weren’t close to the 5 minute timer of when the transmitter communicates. Once every five minutes, the transmitter communicates…so when you issue the stop-session command, try to do it just after the transmitter has just communicated (provided a new BG). That will give you the maximum amount of time to get through the stop/code/start process before getting the receiver shielded.

  33. I am currently using Basal IQ on my t:slim pump and I used method 2 to restart my sensor and it worked FLAWLESSLY!! Super impressed with it, honestly 🙂 I was skeptical about whether the Dexcom app would actually pick the transmitter back up after a reboot, but it did, and then it immediately started reading again without calibrating but there was never a gap in readings on the pump (there was on my phone, obviously), but the sensor start date did get updated to the time it reconnected.

  34. I attempted to stop and restart my G6 using the receiver. I followed the instructions, placed the receiver in the faraday bag, and then went to my phone. Instead of still giving me my glucose readings, it had also restarted and was in the warm up phase. Are you using the dexcom app on your phone or another app? Thank you.

    1. Yes, using the dexcom app on the phone. If the phone app was also showing warm-up phase, that means that the receiver communicated with the transmitter before you got it into the faraday bag (or that your faraday bag was not working well). Every 5 minutes the transmitter sends out a signal and communicates with the phone and transmitter. If the transmitter is able to connect with the receiver, it will learn about the restart command and pass that along to the dexcom app on the phone. I’d guess your bag might not be well shielded. Some have two pockets and only one of the pockets will actually be shielded.

  35. thank you so very much I thought it wasn’t going to work but it does not to save money on sensor if the sensor is attached to your skin very well it can go for weeks before changing before chancing and still not get infective just be carful and don’t keep on to long but you can double life of your sensor and still be safe and that’s just my personal opinion remember that. again thank you i’m sure Dexcom is not happy about this discovery…

  36. Today is the first day using the G6 on my daughter. We accidentally stopped the sensor and are trying to restart using the receiver and your directions. I’m noticing that our receiver is going to “no data” from the warm up only about 15 min after starting the warm up process. Is this normal? Do I just wait the 2 hours regardless?

  37. I just restarted my G6 tonight. So far, looks like it’s working.

    Thank you so very much for the information which allowed me to restart it!

    Sending you hugs and positive karma!

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