I have been a Libre user for a few months now. Whilst I don't have a problem with knocking it off on door jams or even the glue unsticking from my arm, my sensor has come away from the plaster a few times. I think this is due to my upper arms - it is difficult to find a sensor-sized area which remains flat during exercise. I know quite a few people use tegaderm but I am not a fan of single use plastics and some people have mentioned they need to use more than one during the lifetime of a sensor. And I don't want to add another type of glue on my skin that I may become sensitive to. I remembered the Libre rep suggesting VetWrap so I have been experimenting with that after buying a roll from eBay. VetWrap is stretchy roll which sticks to itself so it can be used multiple times. As the name suggests, it is designed for use on animals (hence the "wounded puppy" reference in the topic). It comes in different colours and thicknesses. I have found the 5cm a good thickness and it goes under clothes well. My first roll is black which is fine under dark clothes but not ideal under lighter coloured clothes and with short sleeves looks as if I am in mourning so I have just ordered a roll of white. It seems to stick well during exercise (I have tried it when climbing and weights). The only difficulty is putting it on when alone as I am not double-jointed.