I am also not aware of a method to remove those. I got some scotch on mine as well and I was really unhappy for a week or so, it's in the upper left quadrant but I have to hold it at a very specific angle to see it, not visible under "normal" use, I can feel it though ... but as said above, it's a disposable device. And mine might get replaced with a 6 or maybe not, I'm still loving it and it looks quite pristine even though I'm rather hard on it ...