I have been using the Libre 3 and 3+ and have always had issues with sensors falling off. I am a really sweaty person, and we live in Florida, so unless I want to live like a hermit, sweating is unavoidable. One time, the sensor only lasted three hours when it fell off. For me, those sensors were not lasting the advertised 14 and 15 days, respectfully. I refused to go back to daily pricks as I am highly averse to needles (I'm 45 and I do not have any tattoo's, even after retiring from the U....