take two
I did a bit of Googling for terms like DLP, fuzz, smudge. samsung, etc...
I found a number of references to problems that sound similar to yours. Solutions ranged from just pushing a bit on the screen (gently of course) to anti-static swipes and screen replacements.
The links give all the details...
Link 1
Link 2
Link 3
I hope one of those helps.