My insurance doesn't cover Dex, so I pay for everything out of pocket. Because of this, I always reuse my sensors until they no longer work. I didn't have any problems doing this for my first several months. Now, though, every time I try to restart a sensor after the first week, I get an Err1 message. I dont know what changed, and I have no idea what's causing this or why. Has this happened to anyone else? Any possible solutions? All these sensors worked fine, with no errors or ??? until I tried redrafting them. I can't afford to use the Dex if I can only use the sensors for a week. Thanks all.