I today have been cleaning windows on a house that i only do a few times a year, i also clean the frames the best i can to.The glass doesn't take long but the paint is flaking badly on the frames i do trad and some specks do cause the squeege to streak but thats not to much of a problem as im right up at the window.But it got me wondering would it cause problems with WFP as the specks of paint would get caught in the bristles.