I have a Hampton Bay ceiling fan that is hooked up through a dimmer switch. The fan blades seem to operate as expected. However, the lights over the last few months have faded to the point where they are very dimly lit even though the dimmer switch is turned to the 100% on position. In this position only the fans still appears to spin at its appropriate speed, but the lights remain dimly lit. Does this signal the end of this fan or is there a problem (ex. Faulty wiring) that I can fix to return the lights to their normal state? (I am using 60 watt bulbs, which is allowed for this model, and I have replaced the bulbs to make sure they weren't the issue) Please advise.