My son is having allergic reactions to opsite flexifix tape and hypafix tape. We need tape to tape down his contact detach sites and his dexcom. He appears to have no reaction to the adhesive on the Dexcom or the adhesive on the contact detach and other animas site products. Anyone know what either of these use for adhesive? After 9 days of using hypafix on his Dexcom site, my son was complaining of itching. After removal, I noticed that the blistery, red rash was in the perfect outline of where the hypafix tape was, but nothing where the actual Dexcom adhesive was. Right now, he only has the Dexcom on and I did not tape it down. The transmitter has popped off twice in the last 2 days. I need to tape it down somehow. Any suggestions for other tapes to use?