Washing windows, oh dear, always push out, then brush, still permanently streak torture at it, and one day later it rains determined. Have all kinds of glass cleaner and a miracle cure, and expensive car windows glass cleaner, tested. The hope of a miraculous simple window cleaning is dying last. Then the Kärcher WV 50 plus window vacuum cleaner bought. And I was pleasantly surprised. And washing windows now makes even fun. And it goes very quickly. See my review at the local device. From research, I then urge the original Kärcher glass cleaner replaced by various household glass cleaner, from discounter a Test Well Frog product to superteurem car window cleaner. Result: The Kärcher glass cleaner concentrate yielded the best cleaning effect. It did not dry too quickly, leaving no streaks on removal. The price is also cheaper than the household glass cleaner, as it is a concentrate. Calculated by itself. Conclusion: Highly recommended product in conjunction with the Kärcher WV 50 plus window sucker. May my review for you have been helpful.
