Facing TV Problems? Ask a TV Technician.
Most of the time it is ok just to vacuum the dust and dirt from the filter.
If it clogged bad , you can wash the filter in warm water with a mild dish soap.
Rinse until all soap is gone, and let air dry.
Also make sure the set has adaquate ventilation behind the set. Do not place near
any heat vents. The DLP light engine needs good airflow.