This sensor has been different than all the others. Who knows why (not from a freshly opened box or anything), but it has behaved paradoxically compared to the usual behavior.
When I first put it on, it was scary accurate for the first week. Right away. It always takes 48-72 hours to "settle" in the scary accuracy. This time, right from the get-go.
Did my usual thing and restarted it after it expired at 7 days (I typically get 10-20 days out of a sensor). It seemed fine, but then about day 10 it started showing those "I'm done" signs -- reading too low when I'm high, too high when I'm low, basically the accurate measurement range narrowing. That was last friday.
Got lazy, didn't bother changing it this past weekend. Was "failing" all through. Was in a hurry this morning, so didn't take care of it then either.
And then... today it got scary accurate again. My usual within +/-5 of my meter. At high values (165 this morning when I got up) and low values (caught me heading hypo after I juiced it a bit too much to get that 165 down). I've been testing and calibrating about 2x as much since this started going south last week.
So, I'll ride it out. Maybe I'll get a few more days out of this sensor.
Anyone else have anything like this happen?