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Message: [QUOTE="happyrat1, post: 164965, member: 4476"] Incidentally, my first reply to this thread still applies. From the sound of it, the intermittent scratchiness and volume fluctuations are most likely the direct result of a dirty volume potentiometer and a simple squirt or two of contact cleaner and lubricant will probably fix the problem for years to come. The youtube video I posted applies to cleaning rotary pots, but sliders are essentially the same devices with a slightly different mechanism. Open up the panel and squirt a few drops of contact cleaner into the pot and work it back and forth a few times and then reassemble it and power it up and it should work good as new. And it wouldn't have mattered if he had had a dust cover on the keyboard or not. Over 12 years of use, grime works its way into the mechanism and the internal resistor, be it carbon compound or the more expensive wire wound type, oxidizes on contact with air and airborne moisture and creates a noisy, resistive contact that interferes with normal function. [/QUOTE]