I have been using Libre 1 sensors and went through 22 of them all fine. I decided I should upgrade to Libre 2.
My first Libre 2 started itching after about 2 hours of application and I put up with it for the life of the sensor. It was covered with a patch to keep it from coming off. I removed the patch this morning and my skin came off with the sensor. If you have ever seen a "Cookie cutter shark bite" - It looks like that....
It *COULD* be coincidental that NONE of the Libre 1's caused any sort of reaction and it was just coincidental that the first Libre 2 caused such profound irritation, but Occams suggests otherwise.
I'm going to try another Libre 2 on my other arm and, if I get the same outcome, I will try to revert to Libre 1's - JUST IN CASE there is a formula/application/packaging/storage/whatever change that is causing this.