-
GSC10
I don't use any sensors. I recall from Polar days that there was a dip switch in the speed sensors that you could set to boost the signal strength - you didn't alter that did you?
Leaving bike with magnet near the sensor can drain it quickly too.
It's most likely batteries though - did you buy quality ones or cheapies? Even quality ones could've been old or something.
https://forums.garmin.com/showthread.php?65572-Speed-Cadence-GSC-10-eats-batteries
http://www.bikeforums.net/road-cycling/776166-garmin-cadence-sensor-battery-drain.html
Does the Edge 1000 actually work with Live Tracking?
If I enabled it, and rode an audax this weekend, only turning my phone on at controls, would it update my position in Garmin's website?