Hi, I found a bit of debris on my facetime lens of my iPad 4 I think it's been there since the beginning (doesn't look like lint) I'm just wondering if I should return it. What's the chances I'll get a dud? Will I be getting a refurb unit or a brand new unit? Other than this, my iPad is perfect. Perfect screen and everything. I don't know if it affects the picture or not...I've never seen it without the debris. it's underneath the glass, on the lens itself. I tried to flick it to try to dislodge it but it wouldn't move. it's not directly on top of the lens, rather, it's on the outer edge of the lens (it's a strand of white particle). Thoughts?