Mercedes-Benz made a windshield washer fluid dispenser that doesn't obstruct vision
Mercedes calls this the Magic Vision Control system. It basically replaces the conventional windshield washer fluid spout normally located on the hood of a car and places it directly onto the windshield wiper itself. The wiper then dispenses washing liquid directly in front of the blade as it sweeps so that you aren't losing vision when trying to wash your windows and drive.