Epson PowerLite U50 3700-Lumen WUXGA 3LCD Projector - Manual (Page 178)

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Damage due to the failure to properly maintain the projector or its filter may not be covered by the
projector or lamp Limited Warranties.
Cleaning the Air Filter and Vents
Replacing the Air Filter
Parent topic: Maintaining and Transporting the Projector
Related references
Projector Light Status
Cleaning the Air Filter and Vents
Clean the projector's air filter or vents if they get dusty, or if you see a message telling you to clean them.
Caution: Do not use water or any detergent to clean the air filter. Do not use canned air, or the gases
may leave a flammable residue.
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).