Ironically, I laid out a clean black trash bag on my back seat to protect the seat from another bag I had in the car that had garbage in it. Unfortunately, the black bag seems to have left a transfer stain (black / bluish) on my back seat!! I tried mild soap and water and that did absolutely nothing. I tried baby wipes (Honest brand), and that did absolutely nothing. On a very small portion of the stain I tried a dry eraser and that did absolutely nothing. I keep hearing how easy it is to clean these seats, yet I can't believe something I wouldn't even think would bleed, left this mark that I can't get it off! Any help / tips you can provide would be much appreciated.