How To Clean Bathroom Exhaust Fan Blades. This works well using a shop vac not all Exhaust fans come apart like this you will notice a big difference once you cle. The fan is actually only a few days new.

Turn the fan off at the switch or circuit breaker. Broken fan blades will cause the fan to be louder and less effective. How To Clean A Bathroom Exhaust Fan Family Handyman.
Be careful not to drop the fan or hit it on the side of the exhaust pipe as that could potentially chip the fan blades.
If there is dust and grime inside like there was in mine yuck you can use a vacuum attachment to get most of it out. You may need to replace your bathroom fan blades because the old ones are either broken twisted or an unwanted source of noise. The reason I need to remove it is to clean the gazillion blades. Clean all of the interior surfaces of the fan housing and along the outside edges of the housing.
