Arfa Daily wrote:
Most likely, the existing pot unit would
clean, as the problem goes away temporarily when you quickly rotate it. You
need to pop to your local electronics emporium - Radio Shack, Maplin etc
depending on where in the world you are, and purchase a can of switch
cleaner with lubricant. If you don't have such a store near you, there are
plenty of on-line electronics stores where you could get it.

The best stuff I've found is Caiglabs De-Oxit. It worked after a short
lived fix with the Radio Shack cleaner. It's been over a year and
no static problems (yet).\

It's expensive (about $10 for a little tube), but you just use a little.
One tube will fix about 100 pots.