So I recently got a replacement iPad (2) because the one I had bought was defective. The Smart Cover I had for it, however, was leaving marks and scratches on the side where it attaches!! I wasn't "throwing it on" or anything, but I did take it off and on quiet a bit (but I was careful about it). I was told that taking it on and off wasn't going to harm the iPad, so where did the scratches come from? Im so worried to put it on my new one... How can I avoid scratching my new one?