I installed a new sensor and moments later began coming around the sensor. I called DEXCOM for a repl;acement because it was my last sensor before I was able to get new one from Walgreens. The replacement from DEXCOM arrived 8 days later. I was fortunate in that I was only without a sensor for one day because I was able to borrow one from another DEXCOM user. User's recommendation: You might want to switch to another Continous Glucose Monitor which is what I intend to do.