This is what I do with my 630G with Enlite sensors (YMMV):
1, Turn off the sensor from the pump a few minutes to hour or so before the sensor expires (not sure if it’s necessary to do this before “sensor end” but that’s what I do).
2. Carefully disconnect the transmitter from the sensor and recharge the transmitter. Be sure to do this with as little movement of the sensor as possible. You might need help with this step if your sensor is in an atypical place like back of arm (that’s where I’ve been putting my sensor with great results).
3. Reconnect the transmitter to the sensor after it fully charges. Put your choice of overlay tape over the transmitter (I use IV3000).
4. Start the sensor from the pump as a new sensor.
5. Calibrate after the 2 hour wait period if the ISIG value is 10 or greater and CAL factor (blood glucose divided by ISIG value) is between 3-8. The ISIG value is under Status>Sensor on the pump. If the ISIG is below 10 I remove the sensor.
I normally get a few days to a week of additional use from the sensor, but working hard to try to extend it more. Don’t expect to get as accurate results as you did during the initial 6 day period and it can be erratic during the 24-48 hours after a restart.
From my personal usage of CGM it’s most important value of CGM to me (YMMV) is during intensive exercise. I ride my bicycle 3 times/week on average (75-100 miles a week 14-15 mph average) and really need to keep a close watch on my glucose levels during the ride as they tend to fall like a rock. Even a less than optimal working sensor will usually give me trends on whether my glucose levels are rising (goodness when working out intensively) or falling like a rock. I’ve even kept the sensor off from the pump and turned it on before I exercise. Exercise seems to get interstitial fluid flowing better resulting in more accurate results.
My H1Cs averaged 5.7-5.9 before CGM so I’m well managed even without CGM. I’ve learned a lot about glucose management and behavior by using CGM.