How do I keep DLP screen clean?

Dark shadow/ cloudy spots on DLP screen?

• I have a few spots on my Samsung DLP screen that won't go away. They are somewhat noticeable when the screen is all white or something with a solid background of the same color. I am just curious as to what may be causing this problem. They are more like a shadow or a cloud I suppose on the screen. Could it be dirt on the lens reflecting on the screen or maybe the mirrors being dirty? Any info would be very helpful....

• Answer:

  on the sides of the screen is two round covers. pry off the screw cover to remove these covers. then you can look in at the lens and see if it's covered with dust.