My Lumia 920 front facing camera is filling with dust.

Just curious if this is happening to anyone else. The front facing camera on my Lumia 920 is filling up fast with dust. Do you think this is a problem spread out among Lumia's or did I just get a dud? Also does anyone know if AT&T or Nokia would be willing to fix this problem for me? Thanks guys!

PS - I'll try to post a picture of this but I dont have a camera that can macro good enough to get a clean shot of it.