I've got a whole lot of smudges or something like that on my screen recently... and they don't seem to come off too easily. I'm pretty they're not scratches (least I hope they aren't...) and the thing is, I barely ever touched my screen. I also noticed some small dots on the screen... and I can't get those off too. But anyways, they don't bother me as much as those other long marks I have. Any ideas?