Though I have probably taken hundreds of BG readings since July 2020, I do not have a CGM. For the Data Driven Fasting I am doing, one is not recommended over the cheaper regular meters. Marty Kendall knows all about them since he is managing his wife's T1 with a CGM and closed loop insulin pump. Two years does seem a long time for a sensor (mainly because the strips expire in 6 months) but call the manufacturer customer service to ask or download a copy of the manual. I have read about CGM numbers off because of pressure on the sensor while sleeping.

Found the manual: https://www.freestyle.abbott/us-en/...t/overview.html

FAQ #3 in this Free book is about CGMs. https://www.datadrivenfasting.com/book

Marty's Optimising Nutrition thread is right below here.