I have black laminate countertops. I think from Ikea and they have recently developed large areas that looked bleached out. I don't know how because I don't have any bleach in the kitchen. I use 409 kitchen cleaner and it never left spots before. The areas seem just as smooth still as the other areas so I don't think anythings been rubbed off. When I wet the areas they go black again and then dry back to the lighter color. Any ideas how I can fix this?