Reply to S4 problems in cold environment?

Seem to have problems with the jog wheel disengaging when i'm playing outdoors in cold environments. Not sure if it's the cold or moisture or what, but the job wheel disengages randomly and last time i played the channel faders were tripping out also. I didn't calibrate before playing either times this has happened but i'm curious to know if anyone else has experienced anything like this. That being said, also without calibrating, i never have any trouble when i play at home... Any ideas?