How to Prepare Windshield Washer Fluid?

[DeChristian]

Below are two different preparation methods according to seasonal climates: Spring: With frequent rain and heavy windblown sand, the windshield gets dirty easily. The primary function of the washer fluid during this season is cleaning. First, prepare a clean 2.5L plastic bottle. Mix 2L of purified water, 250ml of 95% medical-grade alcohol, and 1-2 caps of high-quality detergent thoroughly before use. The detergent helps remove sand and dirt as its foam quickly eliminates mud, but avoid excessive amounts as it becomes difficult to rinse off. The alcohol accelerates water evaporation, ensuring the windshield dries quickly. Summer/Fall: Rain may not cause severe dirt buildup, but insect impacts on the windshield are harder to clean with plain water due to stubborn insect residue. Thus, more solvent is needed. Similarly, use a 2.5L plastic bottle with 2L purified water, 500ml of 95% medical-grade alcohol, and 1 cap of detergent.