Best Answer toneman2121 , 21 June 2013 - 03:39 AM
i would say it is defective and needs to be replaced. but you can save the patch with the middle where you want it, then park the knob at zero (all the way ccw) and recall the patch. parking the knob at zero may stop it from changing.
this requires dis-assembly; clean the pot with electronics spray cleanerGo to the full post