Here is a rundown of what needs to be done to clean a bathroom fan:

There should be no electricity going to the fan now. Turning off the power to the fan (either by disconnecting it or flipping a switch) is a prerequisite to cleaning it.

Remove the protective cover from the fan. Most fans for the bathroom include covers that can be quickly removed by pushing a tab or button. Assuming you've removed the cover, you may inspect the fan's motor and blades.

It's important to keep the blades in tiptop shape by brushing their teeth. You can clean the blades by wiping them down with a cloth or a soft bristled brush. If the blades are caked with grime, you can clean them using a solution of mild soap and water. After cleaning, the blades must be allowed to air-dry fully.

It's important to clean the motor regularly. Keep the motor of your bathroom fan clean for optimal performance. To put it simply, the motor is what makes the fan work. The motor should be dusted and cleaned with a dry cloth.

Someone should clean the vent. An aperture in the ceiling of the lavatory serves as a vent, which draws air through the room. Use a dry cloth to wipe the vent clean, and remove any dust or dirt you find.

Rebuild the ventilator's core. Once you've finished cleaning the fan, put it back together, reattach the cover, and turn the power back on.

If you follow these steps, you can give your bathroom fan a deep cleaning and restore its peak performance.