How to Prepare Windshield Washer Fluid?
2 Answers
Here are two different preparation methods based on seasonal climates: 1. Spring: With frequent rain and heavy windblown dust, the windshield gets dirty easily. The primary function of windshield 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 detergent (use high-quality detergent). The detergent helps remove dust as its foam quickly eliminates dirt, but avoid excessive amounts as it may be hard to rinse off. Alcohol accelerates water evaporation for faster cleaning. 2. Summer/Fall: Rain may not heavily soil the windshield, but insect residues are common and hard to remove with plain water due to stubborn insect resin. Thus, more solvent is needed. Similarly, use a 2.5L plastic bottle with 2L purified water, 500ML of 95% medical-grade alcohol, and just 1 cap of detergent.
I'm quite familiar with making windshield washer fluid at home – it's fun and saves money. Take a clean plastic bottle, pour in three parts distilled water (don't use tap water as its minerals can clog nozzles), add one part alcohol like isopropyl alcohol for antifreeze and cleaning, plus a small teaspoon of dish soap (but not too much or it'll foam excessively and obstruct vision). In summer, just mix water with a few drops of detergent. Shake well after mixing to dissolve everything, then store in a spray bottle. The savings are real – store-bought versions cost over twice as much. Keep containers clean to prevent contamination, and I check nozzle cleanliness monthly to avoid long-term buildup issues. Overall simple and rewarding for DIY enthusiasts.
