I have used Medrtonic Cgm for over four years. For the last year I have been experimenting with keeping the sensor in as long as possible. I use the top of my thighs to insert the sensor. Twice I have made it to 21 days. Currently, I have a sensor inserted that has lasted 25 days and is still going with good accuracy and no infection. What's the longest anyone has been able to keep a sensor going?