Thanks everyone for your helpful replies. I think I need to be a little more patient between the spraying and the ironing. Two tips that I have picked up in addition to all of these here on this thread is to put down a piece of fabric, like cheap muslin, over your ironing board to protect it from any residue and then it is easily removed for laundering. The second tip is to use a magic eraser (like Mr. Clean brand or other) on your cold iron and it will clean all the gunk off. I do not have a coated sole plate on my iron so I don't know if it would hurt that or not but it works like a charm on a metal sole plate. I certainly will try and wait more between spritzing and pressing.