This was the first big swimming weekend with my daughter wearing her Dexcom. The sensor failed after three days. Dexcom is replacing the sensor so that's great, but I don't want to be replacing sensors all summer (mostly because that night #1 stinks). After the first extended period of swimming, all the edges on the Opsite lifted, some all the way to the dexcom adhesive, so I think the sensor maybe got partially dislodged (?) that first time. We taped it down immediately and continued to get readings for two more days, but then, it was reading totally wrong (saying under 55 when she was in the high 100's, wouldn't accept a calibration, and then gave us the hourglass with blood drop combo. We tried to restart the sensor, but in the middle of warm up, it failed. I read a thread on swimming and some people use skin tac (causes a blistery reaction in my daughter so that won't work), opsite (we already use this) and there was some mention of vet wrap. Is the vet wrap just for fear of losing the transmitter or does it help keep the sensor on? I need all your help on sticky solutions or else this is going to be a long summer!