Have bought the window cleaner on the advice of a friend. But unfortunately had to find that he no saving of time, let alone more cleanliness brings me. Have previously cleaned the windows always good wet and have then with a conventional window wiper (as the window cleaners do that too) the window deducted. Here I had to then wipe again the window frames. This remains one saves the window sucker. Nevertheless, I have stripes when I previously do not make the lip pat dry. Was my turn a bad investment. Faster's unfortunately not.