after taking my phone in/out for inspection(whipe down) every once in a while, i've noticed my watermark has gone away......
probably took 4 or 5 times in/out ...... for the protection the defender gives me it never bothered me, but like i said it's gone away.....
EDIT: ok i had to go check the phone, i'd say there is probably a mark this size of this typed capital "A", i never see it though especially when the phone is on.......
just hold out before modification take it out once a week and see if it goes away.... like i said above i bought the defender for the protection and the screen protector helps out with rain/splashes.