Trying my first 15 day sensor today. It has been a non event for day 1. Sensor was accurate after warm up. With G7 10 day, accuracy depended on the sensor, so too soon to know if there is a difference.
As previously mentioned warm up is now 1 hour.
CVS filled my prescription as a 10 day sensor and changing sensor every 15 days…really …
. They fixed the issue, but frustrating. They acknowledged the doc wrote the prescription correctly and it was their error.
I seem to get 10 full 24-hour days plus the 12 hour grace period on the g7 even after marinating it for 12 hours
I’m on my second 15 day sensor. The first one bled and gave me a little bruise but surprisingly it worked well! (I do not have good luck with bleeders.) I got the whole 15 days plus grace period. I was a little worried about the adhesive so added the overpatch around day 10 and no problems! I put the sensors in when the previous ones started their grace periods and the data was nice and smooth after that first 12 hours.
That’s very interesting! I hope someone else confirms this.
The timer starts when you insert the sensor, not when it is paired with your phone or receiver. So, if you put it on your body and wait 24 hours to connect it, you’ve lost 1 day of data. It only runs 10/15 days + 12 hours as soon as the sensor leaves the inserter.
I don’t presoak but I have gotten 10.5 days out of G7 10 day sensors about 99% of the time.
That’s why it is so interesting that Sam presoaked for 12 hours, and then got 10.5 days of data when he started the sensor. If someone else confirms this, we’ll have to start thinking that the software+firmware has changed, and now they’re only killing the sensor 10/15 days + 12 hours after the sensor is started in the software, not after it is first inserted. If that turns out to be true, next we can start wondering if this change has opened a possibility to find some way to restart the sensor. Or maybe the new G7 sensors all run 15 days internally, and the 10-day version is only stopped after 10 days by the software, not by the sensor firmware turning itself off after 10 days as it used to do.
I really don’t think that is the case - there may be a miscommunication or misunderstanding here.
For example, my Dexcom app shows that I inserted my current 15-day sensor on 6/13 at 8:38pm and it expires on 6/28 at 8:38pm (plus the 12-hour grace period after). I did not start it in my phone until 6/14 in the morning. This is how my 10-day sensors worked too.
As soon as the sensor gets away from the magnet in the inserter, it starts regardless of what tech you have it paired with.
The interesting question is whether the G7 sensor now continues to send data after the official expiration time (i.e., based on when it was removed from the inserter.) In the past, the answer was no, the sensor turned itself off. Maybe that’s still true, but Sam’s comment raises the possibility that something has changed, and so I’ll remain open to that possibility in case someone else has a confirmatory experience. The 2 key questions are (1) does the sensor still turn itself off 10/15+12hours after it leaves the magnet in the inserter, and (2) does the Dexcom app still enforce a 10/15+12hours deadline even if the sensor itself does not.
@sam I’m sure you know how it works, so I’m amazed you got what appears to be an extra 12 hours use! I expect it’s a fluke and wish the rest of us could be so lucky! I see several others have responded similarly! It’s envy! Let us know if it happens again!
@bkh What I know is that when the sensor expires the device continues to transmit Bluetooth. If I tell my phone to forget the device it will try pairing again. My solution is to wrap the old sensor in foil, forget that Bluetooth connection, insert the new sensor, pair to pump, phone & watch. Isolating the old sensor and removing it from Bluetooth seems to make all pairings fast and seamless.
Note- my phone is an iPhone. Android may be different.
@Sam was talking about the G7-10, the “G10”:
Nothing else makes sense.
I haven’t tried that experiment, i.e. do a presoak (it doesn’t have to be 12 hours) on a G10 and see if, after I first connect, whether I get the full 252 hours (10.5 days). Simple experiment for those of us who presoak, maybe I’ll do it.
Nothing to do with the G15 of course, except that it might do the same (pointless for me, as it doesn’t last 13 days…)
I guess I was wrong—- or maybe it’s changed. I inserted one sbout 6 ago and just now activated it— it shows the start time as 6 hours ago and the expiration time 240 hours past then
Really nothing exciting to report on my first 15 day sensor. Performance was similar to the 10 day. No adhesive issues.
Your plan also works well with G7 10-day.
I often put in the new sensor a few hours in advance, and then when I activate it, it starts working immediately.
Ya gotta remember to get the old Bluetooth connections out of your phone before they foul up your system. I take a screenshot and put the startup date on it so it’s easy to find the old connection.
Just wondering - does each session of the G7 establish a new bluetooth connection?
Like in the G6 you had to establish a new bluetooth connection when you change the transmitter - every 90 days.
Is it more frequent for the G7?
@bostrav59 Yes, the G7 establishes a different code with each insertion. It ends up creating multiple “potential” connections and it used to be thought (I have no proof) that the old connections could complicate the connection process for a new G7. I once actually had an old G7 “reactivate” itself and become the primary BT for the app (no idea how it happended), so I literally drove a stake though it’s heart (a metal punch and hammer, though a microwave is used by several people). It’s important to note the six digit BT code for the sensor when its shown during the activation process so you don’t remove the wrong connection. To remove BT devices on iPhone: SETTINGS, BLUETOOTH, press the circled “i”, and press FORGET THIS DEVICE. All the Dexcom devices begin with “DX”. Don’t delete the sensor you most recently added.
But if you happen to delete the one that you’re currently using, It’s not a disaster. I’ve read that it will just ask to pair again sometime within the next 5 minutes, so it doesn’t kill the sensor or anything.
Thanks for the info @bkh. I haven’t experienced it, but @bkh seems to be correct! I found this on Dexcom’s website:
To remove old sensors from the Bluetooth connections list while you are wearing one, follow the above steps and keep these tips in mind:
Yes, each new sensor sets a new Bluetooth connection. What happens if you don’t remove the old ones is that the new sensor you just put on gets confused and can’t find the new Bluetooth connection.
If you look at your Bluetooth connections you will find the Dexcom Bluetooth starts with the letter D.
Mine shows DXCMbb, they are all similar.