regarding that business about provoking “???” when you move:
It sounds like you’ve got excess motion (between the wire and your SubQ tissue) when you move.
To reduce this motion, the first thing you should try is pre-wiping your target area (the whole area which will be under the pad) with Smith+Nephew “Skin Prep”. This is not the same thing as “I.V. Prep” – it’s made specifically for helping taped-down appliances to stay in place. It probably isn’t in stock at your typical drugstore/chemist’s shop. (The thin layer of adhesive helper also serves as a barrier between your skin and the Dexcom adhesive, reducing inflammation and itching.) Let it dry COMPLETELY before you set the Dexcom assembly in place
Next, you should press the Sensor housing VERY firmly into your skin after setting it in place, BEFORE shooting in the wire. You should also use your fingernail, or another narrow-but-not-too sharp tool, to press the adhesive fabric down too.
Don’t drag across the fabric, that causes damage. Just press fairly hard, starting at the edge of the transmitter housing. (Press down on the housing to keep your skin level during this step.) After pressing, move a 16th of an inch outwards, press again, and so on. Then go around to another area of the housing and work your way outwards again. Some people use fingernails for this. My fingernails aren’t long enough, and I have noticed that the “safety clip” is perfect for doing this-- take it off the “shooter” assembly, and use one of the 30-degree angled, rounded corners to do the pressing.
THEN shot the Sensor. When removing the “shooter”, try to keep the transmitter clip flat and motionless. Same with putting the Transmitter in and bending the lever to clip it into place. (And be absolutely sure that you’ve heard TWO separate clicks, it’s very easy to leave one side of the Transmitter loose.)
Finally, the last trick: To break off the Transmitter placement lever, use your thumb and index finger from one hand on the end of the two clips (not the middle “ridged” area which loosens the clips-- the very ends, next to the lever which you’re about to snap off. Squeezing your fingers together in this place holds the transmitter MORE tightly.) Now rotate the lever to snap it off, while using your two-fingered grip to keep the Transmitter housing and Sensor from twisting with the lever.
When circumstances force me to use only the “official” 2-hour warm-up period, my accuracy during the first 6-10 hours almost always sucks. If you eventually become able to predict how many days you get from “typical” Sensors (for me it’s about 15-16 days, then you have the option of inserting a new one and giving it a longer period of “pre-warmup” before moving the Transmitter and actually using it. Although I can get 15 days, I’ve taken to doing the switch on day 13 (day 14 at the latest), to make sure that I’m switching well before the old one becomes unreliable. This allows me to do the “pre-warmup” trick nearly every time.
BTW, that soreness you had was an almost certain indication of an unlucky site or bent wire. The wire was tearing/pressing/sliding at something sensitive, and that doesn’t happen within the calm, undisturbed, undifferentiated SubQ tissue where the Sensors work well.