Winter morning procedure is get in the car and turn the engine on and press front and rear screen heaters and put the wipers on normal speed; then press the screen wash every 30 seconds or so, depending on how thick the ice is it's usually gone within a couple of minutes at the most. Much nicer than having to scrape the window!
Of course it doesn't help with snow but I can just brush that off and it'll deal with the ice underneath.
It doesn't help with side windows, so I often have to drive with those open until the heater comes in; that's if they aren't frozen shut!