Strange color smudge/stain on image
Hello. I have a 6-month old Optoma Gt 1080 projector. Out the sudden it started displaying a strange "stain" that is always fixed in the same position. It is always present, but very noticeable with light colors. I have cleaned the exterior glass with no result. After doing some research, I concluded that the lamp should not be the issue here (the problem seems like something else, and the lamp has been used less than 200 hs.). Do you think it is a dust or dirt problem? Any help is greatly appreciated.
Is this a good question?