Sometimes I can't stand the sight of my wife pathetically scraping her windows on a cold morning, as she makes a right hash of it! She's a stunningly bright, clever woman but practicalities are not her strong suite!
So.... I fill a 2 litre plastic jug with hot water from the kitchen tap, adjust it down with a touch of cold water, and slowly pour it over the front and rear and side screens whilst she sits in. Job done in seconds.
The only downside....... is if it's truly cold and below freezing all day, then the water that runs off onto the drive freezes over solid. If it's a strong cold spell, then the spray de-icer goes on about 10 mins before departure and makes scraping off much easier.