Can an 81xxxx Dexcom Transmitter with 1.6.5.27 firmware be reset?

Just an FYI for anyone searching on how to reset the days since activation to zero on the Dexcom 81xxxx transmitter with 1.6.5.27 software.
My experience is that it currently (Nov 18,2019) cannot be reset.
I’ve been working on this for 2 weeks with a lot of help from this forum and other forums. I have not been successful. I have tried the following apps:
–Reset App
–XDrip Plus
–Spike-App
With each app I have attempted to reset multiple times (I didn’t keep count but at least 5 times each app).
I have found 2 people on another forum that think it has similar firmware to the Firefly transmitter and both say they do not think it can be reset.
OK, now you know everything I know about it.
If you have had success resetting this transmitter/firmware combo, please share your method.

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