OhmaRayée541 week ago000Have you tried cleaning the roof of your veranda with w2s omni? Inside and out?Show in original language (French)samacker1 week ago • purchased this product000purchased this product Helpful answerIt doesn't work. It can only clean vertical windows. The same applies to a VELUX: you have to put it upright, otherwise it sounds an alarm and stops. Show in original language (French)Comment