Today I started to clean the driver side leather seat of my 2011 DTS. I decided to use the Orange Lexol leather cleaner. I shook the product, applied it to my cloth and began to rub it on the leather, when I looked at the cloth it looked darker than I thought. Is this dirt coming off my seat or am I removing the black dye of the leather? I also tried using some home made APC which is dilluted ONR. That didn't make my cloth as black.