Are you sure it's the pedal and not your cables? If so, then the pot is probably going out on the wah. You need to replace it, which is easy to do.
Dunlop and Fulltone both make replacement pots for wah pedals.
What are you talking about? Morley has made some of the best wah pedals around. Granted, they're not a Crybaby, but Steve Vai uses them. I think the photocell is probably a bit more reliable than a potentiometer.