It's pretty rare for me to experience blood at the site of a Dexcom sensor. So Im coming up on about the 20 day Mark and getting ready to reset my sensor for a second time. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Im in the same boat! In this video, a Dexcom G6 CGM user goes through the steps for replacing the transmitter, pairing the transmitter and sensor, and starting the new sensor.