How to do if the electric fan is noisy?
This requires the electric fan to be taken apart for cleaning
Add a bit of grease to the axle, sew on the oil, or order some cooking oil
Fan leaves may be dirty or deformed, and the center of gravity of the fan leaves is not in the center, which makes it easy to shake and make noise.
Take apart the motor housing, there is a hole in the oil, plus sewing machine oil best
