If dust accumulates in the lamp filter, it can cause overheating and reduce the life of the lamp. Epson recommends cleaning the lamp filter every three months; clean it more often if the projector is used in a dusty environment.
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8. Hold the shutter open, and use a vacuum cleaner to remove any dust from the wire mesh filters inside. 9. Insert the lamp back into the projector, tighten its screws, and replace the lamp cover. Epson is a registered trademark of SEIKO EPSON CORPORATION.