In this picture, I pulled the filters up so you can see where they are located. In the top left corner, you can see the main filter sticking out. Towards the top right (wedged between the grey bar and two grey bumps) you can see the bulb filter. Pull these out, blow out the dust, then put them back. This will help extend the life of the projector. Also, please turn off the projectors when not in use. These two steps will help extend the life of the projectors.
