NOTE: We do not recommend using expired test strips, this is merely a demonstration of what we found when tested using several expired test strips and is in no way intended for you to use expired test strips.
I'm currently using an expired glucose sensor. I started it this morning, and have tested low almost all day long. If the meter tests at 5, my CGM is reading at 3. I have the auto suspend for sugars lower than 2.5, and it's suspended twice on me! I'll be interested to see how the rest of the day goes. Perhaps using the expired sensor will turn out to be a bad idea...