The store employees repeatedly offered me a "cleaning pad" that stuck to the back side of the phone. They put it on the camera metal. They would come take it off to wipe the screen and then just replace it on the back over the camera metal again.
HTC One X (original from AT&T)
Asus Transformer Infinity TF700T
Asus Transformer Prime TF201 - Now in my daughtes hands
Former Devices: Nokia Lumia 900, Samsung Focus, Dell Venue Pro (for 2 weeks), Tilt 2, Fuze, Tilt, HP HX4700