I use something like this. It stays on for 10 days at least. https://www.amazon.com/Freestyle-Adhesive-Patches-Waterproof-Without/dp/B08VD5HJ7L/ref=sr_1_27?crid=2XQDAOK75GVY9&keywords=freestyle+libre+2+sensor+covers&qid=1688791903&sprefix=freestyle+libre+%2Caps%2C135&sr=8-27