Clean
the projection window periodically, or whenever you notice dust or
smudges on the surface.
To remove dust or smudges, gently wipe the projection
window with lens-cleaning paper.
Warning: Do
not use a lens cleaner that contains flammable gas. The high heat
generated by the projector may cause a fire.
Caution:
Do not use glass cleaner or any harsh
materials to clean the projection window and do not subject the
projection window to any impacts; you may damage it.