Charles B Dallas , TX January 30, 2015 The mount on the squirrel cage had broken causing the bathroom ceiling fan to make a lot of noise Pulled the fan apart, cleaned the lint from the fan and oiled the bearings using a good quality gin oil and replaced the squirrel cage with a new one. The bathroom exhaust fan is much quieter now. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes