My wife's comp has a pair of Logitech z625 speakers. They sound fine, but they're afflicted with obnoxious potentiometer scratching that I can only briefly subdue with Deoxit. Is there a better fix?

I was bitten by the audiophile bug at a relatively young age. When I was in my early teens, my parents purchased me a high-end stereo system complete with tuner, equalizer, dual cassette deck, 25-disc ...