Cleaning Dirty Potentiometers in a Music Man HD-130
Introduction
This is a guide on how to clean dirty potentiometers. In my example I've used my Music Man HD-130 Reverb head, but this guide can be followed for most amplifiers, especially Fender and other tube heads.
CAUTION: Before you begin, ensure that the amplifier is unplugged and has been powered off for at least 20 minutes. Amplifiers are high power electronics and can shock you if not approached with the proper caution.
Starting with the furthest right potentiometer, spray your electronics cleaner into the holes on top.
If you're in a hurry you can just spray into the one that is causing problems, but if you have the time you might as well clean everything as you've already disassembled!