What happens next?

How to muffle a fan
Check that the fan's blades are evenly spaced and aligned.
Bend any blades out of position back into place. Do this very carefully as the blades could snap.

Choose from:
-- Oil a fan's motor bearings if you hear a grinding, ticking or rubbing noise as the fan spins. Use a non-detergent motor oil that is lightweight..
-- Find a steady, sturdy object to hold onto. A box, coffee can, or some other kind of flat surface will make it much easier to hold the fan..
-- Shut up any other fans that may be in the room. Turn off all other fans in the room..
-- Also look at the connectors on the blades. Note if your blades are well grooved or not..
Oil a fan's motor bearings if you hear a grinding, ticking or rubbing noise as the fan spins. Use a non-detergent motor oil that is lightweight.