03-16-2012, 08:42 PM
When a control gets really bad I carefully open them up and clean the resistive element and the wiper by dipping it in varsol to get rid of grease and then with rubbing alcohol to get rid of any oil left behind. Sometimes the shaft is stiff and I have to undo the "C" clip holding it in, clean the shaft and bushing, and regrease the bushing. Don't try any of is if you think you may loose or break something.
Regards
Arran
Regards
Arran