Spray this onto your window, let it soak for 1 - 2 minutes, ice on glass will fall off easier.
The problem with ice scrapper is that there is a possibility that you destroy your windshield wiper (you try to separate it from windshield). The cost of a wiper is 15 CAD.
If your car is not power lock, you can spray this onto key hole, very effective.
In ottawa, there is freezing rain. If you find ice on your car door, sticking between that plastic tune, just spray onto it, one minute, done.