I use these patches (see link below) when my CGM tape isn’t wearing as well as it should, and they’ve been SUPER handy. It sticks best when I wipe the skin off with alcohol (and let it dry) first... sometimes a little TOO well, requiring unisolve to remove it without losing skin!

https://www.amazon.com/dp/B06XS2Y17V/ref=cm_sw_r_cp_api_5OO1Ab1CMPG8S