Ive had one of these in tan for a few months now and at first it was gorgeous. Now the parts where my fingers grip the phone are dark and discolored (I never touch my phone unless my hands are super clean) and I have no idea how to clean it. I tried wiping it lightly with a Magic Eraser and that seemed to ruin a bit of the engraving and it made it a bit worse. It's a tan color and that seemed to rub off a bit as well. Am I just out of luck? Just as a side note Grove n longer sells these, guess that's probably why. Any leather experts out there with suggestions? Thanks!