Another vote for opsite flexifix and you can get it on prescription...I alcohol wipe, pop the sensor in and then add some tape over the top straightaway with the whole in the middle. I have some extra all over cover tegaderm style dressings to try out in the holidays when hopefully I will get some pool time, but I reckon the flexifix should hold well as it is still very sticky when I take the sensor off a couple of weeks later.