Epson EpiqVision Ultra LS800 4000-Lumen Pixel-Shift 4K UHD Ultra-Short Throw Laser 3LCD Smart Home Theater Projector (Black) - Manual (Page 104)

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7. Pull the air filter out of the air filter cover.
8. Vacuum the front of the air filter (the side with the tabs) to remove any remaining dust.
Caution: Do not rinse the air filter in water, or use any detergent or solvent to clean it. Do not use
canned air; the gases may leave a flammable residue, or push dust and debris into the projector's
optics or other sensitive areas.
Note: If dust is difficult to remove or the air filter is damaged, replace the air filter.