So after much putting off, I bought the Radtech cloth to protect the screen of my 13" MBA, and so far it is doing very well. That said, I did kind of put off getting it, and it has been getting squished in my bag with all of my books and such, so today when I was trying to clean the screen a bit, I noticed that the keyboard well and the top of the trackpad have left a slight, barely noticeable line on the screen. Seriously, you need to have the screen completely dimmed or off to see it at this point, so its not that big a deal. Of course, I tried to scrub it out with some cleaning fluid and a cloth, but it's still there; any ideas for cleaning, or is this a repair thing? would the warranty cover it? and is it even worth the time & trouble? thanks!