...cleansers such as the windex that it not only cleans, but puts some sort of film on the window... always found that furniture sprays, like Pledge, build up over time, and the best way to remove them is with Windex. Anyway, Windex is a definite no-no on granite. Formula 409 works fine, though. I noticed this on my black stovetop; that it cleans up nice and shiny with the cleanser, but ...