I like to calibrate my Guardian sensor (670G system) about an hour after I get up everyday. However, my sensor reading is consistently 20-30 mg/dl below my fingerstick glucose. My meter passes controls as it should, I’ve gotten the same results on other meters (and different brands), my strips are in date and stored properly. My numbers match up fairly well the rest of the day. It happens nearly everyday, not just on new sensors, and regardless of where I have the sensor placed (abdomen, thighs, arms).
Since I am almost always in auto mode, this really messes with my ‘feet on the floor’ syndrome. I shoot up to 170-200 (fingerstick) and my pump isn’t adjusting basal insulin enough because it thinks I’m lower.
Has anyone experienced this? Any ideas or tips?
T1 since 1995