Let's try this. Follow the Radio Shack advice. Grab a folded bath towel and place under the unit to catch runoff. Now squirt the volume pot from every direction possible using the tiny plastic attachment which concentrates the stream of cleaner. I mean soak the sucker and turn the pot at the same time to move the cleaner around inside. If this does not work, the pot may be toast. Then your alternative is a visit to a tech.
