I bought my iPad a couple of months ago at Best Buy (open item). Check out the two pictures below. I didn't notice this before but I was wondering what the heck this is. When the screen is clean (on or off), you cannot see it at all but when I was cleaning it (using the mouth-fog & tissue method) you can see this rectangle-looking smudge on it, as if a label was placed on it or something. I was thinking of cleaning it with some Windex or something but I didn't want to mess up the screen. Any ideas? It doesnt bother me that much other than knowing it's there, but I would like to know what it is, if and how I can remove it, and if it will have any long term affect on my screen. Thanks.