How can I effectively clean a bathroom exhaust fan to ensure optimal performance and air quality in my bathroom?

To effectively clean a bathroom exhaust fan for optimal performance and air quality, first turn off the power to the fan. Remove the cover and use a vacuum or brush to remove dust and debris. Wipe down the fan blades and housing with a damp cloth and mild cleaner. Ensure the fan is completely dry before reassembling. Regular cleaning every few months will help maintain air quality in your bathroom.