I have been using libre 2 for two months now. The first 3 sensors worked fine but my 4th sensor gave me alarm saying my sensor has 4 days left. When I later checked, it said Loss of signal, so I tried to scan it with my phone but then it said sansor has failed and I should change it! I tried restarting both my phone and the app a few times but without success. So I don't know why the sensor failed. I've not kocked it or anything like that and it is still stuck to my arm and looks fine. It just failed 4 days earlier than expected! Has anyone else had this kind of issue and is there a way to re-set these sensors?