I have searched a lot on the Internet and bought the 2 Window cleaner WV plus. I'm not a big fan of window cleaning, but with the window cleaner is no problem. However, I have a couple of strips from both sides, but I can live with. The Window cleaning is now very fast, even large surfaces it cleans without problems. However, I have the window before or pre-treated with a sponge, as we live near the field and a lot of dust on the windows was. I forgive 5 star and the device would also Recommend repeatedly.