I think I’ve just been extremely lucky with my Dexcom experience. I got mine at the end of March and I’m currently on my 5th sensor. Never had any weird, wildly inaccurate readings until the end of my 4th one. I was a little over two weeks into it and it started getting pretty wonky. It would swing from 90 to 80, back to 90 then down to 70. It made the little dot graph look choppy and that never happened to me before! After getting the ??? for the first time in this whole experience I decided to change it out. After putting in the current (5th) one it was still doing it! It was showing a down arrow yet the numbers were going up! I know the first 24 hours are usually hit or miss but the level of inaccuracy was crazy. I was so worried that maybe something was wrong with the transmitter, but I was patient, and after about a day it’s back to normal. Phew!
