[codefox1]

Agree, sometimes there is so much "gunk" along the shaft that the control becomes paralyzed upon spraying, no matter what. Then there are a few odd-ball potentiometers that have had their carbon tracks dissolved by otherwise trusted and respected "universal" cleaners. WD-40 applied with a toothpick to loosen shaft to body after a squirt of Deoxit into the body and several turns back and forth followed by a few hours of rest and drainage has been helpful in many cases. A tiny bit of light machine oil like "3 in1" again applied with a toothpick can help maintain the smooth operation of the control sleeve.