Yes, I’ve had to have at least every other one replaced due to one occasionally coming off (despite using an alcohol wipe and tegaderm over it), or more often it just stopping working before the 14 days is up. Abbott always replace it but sometimes it takes three weeks to get the replacement as they are very slow. I self fund and if it wasn’t for the fact that there isn’t a similarly priced alternative, and the info it gives is so useful I would have stopped/changed provider by now.