As I understand it if I want to extend the life of a sensor beyond 7 days then I just enter Stop Sensor, wait 10 to 15 minutes and enter Start Sensor and then wait 2 hours etc as if I had inserted a new sensor.
What signs do you take as indicating a new sensor is required? Readings way off meter readings or the dreaded ??? which touch wood I haven't seen yet. So far I've no problems with sensor not adhering.