After using Future on my squadron clear B-17 canopies and windows, I masked them with an Eduard mask set made for the B-17. After painting and spraying the gloss and flat coats I removed the masks and noticed the windows were not crystal clear but foggy. What did I do wrong or can I clean up the windows with windex? The masking worked beautifully but I am disappointed that the windows are not crystal clear. There doesn't appear to be any sticky residue but the windows are not crystal clear.