I have found that applying sensors late at night has been really helpful - it's key that the sensors are kept completely dry for an hour or two after applying otherwise I find they just fall off. By doing it late at night, I know I won't be showering, or dying in the heat during the day and sweating it off. Might be worth a go 🙂 for what it's worth, doing it this way I haven't lost a sensor for the last 2 years or so 🙂