It might be time for a new belt. The screech you hear is probably the motor shaft coming up to speed before it "grabs". Any oiling or spray would only make it worse. Most drum rollers were replaced with teflon 'glides' for the drums 20+ years ago so unless one is worn through, that's probably not it. The belt is cheap, but kind of difficult to replace depending on the model. Whatever it is, it's probably something simple and worth investigating. -C