I have used Dexcom for 4 weeks now. Every damn time I take the sensor off the adhesive has given me a bad rash/burn. Each time the rash/burn has gotten worse. It itches and it burns! It is awful. Dexcom is supposed to be sending me overlay patches which I have been trying to get for a couple of weeks now. I keep getting an e-mail that they are on their way but when I check the tracking number, no such number exists. Dexcom is a waste. The pictures below if they came out do NOT give the actual rash and burns I received any justice! User's recommendation: Stay Away.