in any case, do not compare with manual wet windows - while wiping the frame, washing the screens, the glass is clean. The more often you change napkins, the better the result. I would like to try a model of the same brand with a sprinkler. Some pros: works clearly, makes moderate noise, disks and good napkins are conveniently attached. significantly saves time and effort. Has some cons a weak connector for a wire, if the wire gets caught, can move away, and the electricity supply will stop. If you moisten the wipes more than necessary, it slips off and the movement program may fail.