How do you get rid of Krud Kutter marks on window?
The issue is that the product has dried on the window. This creates a nasty streaky look that is hard to remove. There are two options to remove this problem. Fist the natural way you can try Apple Cider Viniger on the marks. If this does not work there is a product at Auto Parts stores call Dura-Gloss Water Spot Remover.