04/06/2025
Ingredients:
32 ounces white distilled vinegar
96 ounces distilled water
Three or four drops Dawn dish detergent or a tablespoon of car wash/shampoo
Clean one gallon jug
Blue food coloring (optional)
Note:
For colder climates, cutting the vinegar to 16 ounces and replacing it with 16 ounces of 70 percent or higher isopropyl alcohol should offer freezing protection to around 20 F.
According to Feliz, “Through the magic of chemistry, 40 percent methanol will prevent washer fluid from freezing where temperatures drop below -10 F. He adds, “Although the dilution ratio is relatively low, methanol is a strong solvent [and] proper dilution is important to decrease harming the finish.”
