After 9 years, my Watts water heater pump has begun sticking, and the timer is failing to advance. When I rotate the dial, I can hear the impellor on the pump working, and all seems fine, but it has begun to stick on one of the timer tabs. Before spending another $250 and replacing it, has anyone had any luck blowing out the dust, then spraying a lubricant on the dial, to make it rotate better?