Homemade windshield washer fluid can be made easily and inexpensively using common household ingredients. A popular recipe includes mixing 8 ounces of 99% isopropyl rubbing alcohol, 1 ounce of liquid castile soap, and water (to fill 1 gallon), with optional blue food coloring. The rubbing alcohol helps prevent freezing, and the soap aids in cleaning. This fluid is non-toxic, cost- effective, and suitable for various weather conditions, with more alcohol added for colder climates to prevent freezing.
Another common recipe uses distilled water (2 cups), 1 cup of isopropyl alcohol, and 1 tablespoon of liquid dish soap, optionally adding lemon essential oil for fragrance. This mixture also prevents freezing and cleans effectively.
An alternative quick blend includes mixing 1 cup of glass cleaner with water in a gallon jug, which works well in warmer weather. Adding 1 cup of isopropyl alcohol turns this into a winter blend to prevent freezing.
Key tips include using distilled water to avoid clogging, and avoiding commercial fluids containing toxic methanol. Homemade versions are safer and environmentally friendlier.
