When and how should I clean or replace the air filter?

• Clean the projector's air filter or vents if they get dusty, or if you see a message telling you to clean them.
  
  Do the following:
  1. Turn off the projector and unplug the power cord.
  2. Gently remove the dust using a small vacuum designed for computers or a very soft brush (such as a paintbrush).
  Note: You can remove the air filter so you can clean both sides of it. Do not rinse the air filter in water, or use any detergent or solvent to clean it.
  
  Caution: Do not use canned air, or the gases may leave residue.
  3. If dust is difficult to remove or the air filter is damaged, replace the air filter.
  
  Related references
  Cleaning the Air Filter and Vents
  Replacing the Air Filter