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I have done this on my car windows and windshield for years. Well, this year was SnowZilla 2016 and I noticed that my neighbors were following my method. Sure helps. We live in townhouses and there is no way to move 30+ inches of snow and put it in a yard but it sure helps to clean the windows :) Good luck! BTW, the alcohol in water with some soap described below works nicely on porch and walkways :) Just gotta stay ahead of the snow depths. Since it snowed most of the night and then all day Saturday, the only area I was successful with was the porch.