Has anyone else had skin irritation from the dexcom sensor tape? For the first few months my skin was fine but now my skin is becoming itchy under the sensor and around it, and also small bumps along the outside of the tape, symptoms usually start on the 3rd day of wearing it. I change my sites weekly and rotate from stomach to arms, making sure that I'm not always using the same sites. Is there any products you would recommend for this and or a skin prep? Thanks!!