I've been having a few problems with inexplicable ??? intervals that come & then go. So I phoned Dexcom Support. The lady told me to check the transmitter to see if it was correctly inserted into the sensor on both sides, so I got a mirror & lo & behold on the bottom edge the Transmitter wing was not under the white bit. Since then I've had no problems so far, but I don't see any way to snap the transmitter into place in situ. This could also explain why Dexcom is a bit off after I shower.
My question, how do you ensure that the transmitter is correctly latched into the sensor, for me as the sensor is horizontal I can't see the bottom side without a mirror.