My wife and I both got new boots recently. Last night, when my Dalton's arrived, I wasted no time in conditioning them. I asked my wife if she'd like me to do the same to hers and she agreed. However, her boots have an undressed stacked leather heel and in a few spots, the conditioner came into contact with it, darkening those spots. br> Before it is suggested to simply condition the entire heel, she likes the contrasting color of the dark boot and light heel. Will this fade? Is there anything I can do to get it back to the original color?