Anyone know how to remove an indentation from the back of the Apple leather case? I used it in a flipbelt. The phone is the Plus so the fit in the flipbelt is very tight snug. I used it yesterday and ended up with a lengthwise indentation in the leather. The leather is not scratched or dug up but just has an annoying mark. I tried using leather conditioner on it and then a hair dryer to heat it up to soften and rub out the mark but neither worked. Any suggestions to remove the indentation mark without further damage to the leather?