Be careful about what kind of mini-blinds you try to clean using any wet method. The brand “Three Day Blinds” who sell metal vertical blinds that are spray painted are notorious for the paint peeling off if you are not careful. I soaked a set in the bathtub for a few hours to get off a fews years of dirt and grime and they looked great (for about a day) The next morning, all the paint began to peel off!