Make a de-icer spray A de-icer spray can make clearing off ice and snow much easier. Mix two-thirds rubbing alcohol and one-third water and place into a spray bottle. Shake up the bottle, spray the solution on your windshield, and watch as the ice and frost disappears.Click to see full answer. In this manner, does rubbing alcohol melt ice on windshield? Apply an alcohol and water solution to melt the ice. Make a 2:1 rubbing alcohol to water solution and fill a spray bottle with it. This will melt the ice more quickly than warm water. Unlike the saltwater solution, the alcohol solution can be sprayed liberally without risking damage to your car.Likewise, what is the fastest way to melt ice on a windshield? If your windshield has ice on it and you need to defrost it quickly, simply mix two parts rubbing alcohol to one part room temperature water in a spray bottle. Spray the solution on your windshield and sit back and watch. The alcohol causes the ice to instantly slide off your windshield. In this regard, is rubbing alcohol and water bad for your windshield? To make an alcohol solution, simply mix one part water and two parts 70% isopropyl alcohol in a spray bottle. Whether you’re using saltwater or alcohol, when you spray these onto your icy windshield, the frost will begin to dissolve, while the ice will begin to melt and break apart.How do you defrost car windows with rubbing alcohol?water and ? isopropyl or rubbing alcohol together in a spray bottle. Spray the solution directly onto your front and back windshield and watch the ice melt instantly. “Because alcohol has a very low freezing point, it causes the ice to break up and melt,” explains Burkhauser.