Mix together 3 cups rubbing alcohol and 1 tablespoon liquid dishwashing detergent in a gallon-size jug. Fill with water, cover, and shake to mix well.
Label it, cap tightly, and keep out of reach of children. Shake well, then pour the mixture into your car’s windshield washer compartment. You can use this in your car year-round because the alcohol will prevent it from freezing in the winter. Dave