Hi all! I just discovered a huge black mark on my red fendi spy bag. I bought the apple leather cleaner and apple leather conditioner kit today but i'm reading not so good reviews about the cleaner (color rubbing off?) so i need advice if any of you have used the apple leather cleaner and has had successful results with it? it also says that it should be used on leather that is not pre-treated. what does that mean?? help please. thanks guys