We've been using the minimed system for about 2 weeks and haven't gotten a sensor to last beyond 3 days. Is there anything you guys are doing to get it to last for 6? My son wears his on his upper butt. We've been getting great readings and are having a good experience overall, but I had hoped he could wear it longer. We haven't had one fall out, even with long beach days and swimming. We cover it with a "knuckle" band-aid, as most other covering irritated his skin. and this holds well with minimum impact on skin and doesn't stick to the transmittor. We cover that with Tagaderm for swimming. He's very athetic and is constantly on the move. I'd greatly appreciate any pointers.