The tone pot on my Charvel has a really obnoxious issue with the tone pot. When you touch it or turn it something comes ungrounded or otherwise creates this awful buzzing sound. Solder joints are good, so did I cook the pot or capacitor? This is driving me mad as I can't use the tone control reliably without having to stop and tap it a few times to get the buzzing to stop.
Sounds like a bad pot. I would just replace the pot and capacitor, takes care of the problem every time.