What is the recipe for homemade car windshield washer fluid?

[ElleMarie]

Car homemade windshield washer fluid recipe is: 2 liters of purified water, 500 milliliters of medical alcohol, and a small amount of dishwashing liquid. The preparation steps are: 1. First, prepare medical alcohol, beverage bottles, and dishwashing liquid; 2. Fill a 2.5-liter mineral water bottle with approximately 2 liters of purified water; 3. Add about 500 milliliters of medical alcohol to the mineral water bottle; 4. Add a bottle cap of dishwashing liquid; 5. Gently stir until well mixed. Windshield washer fluid, also known as windshield liquid, is used to clean the windshields of vehicles and other means of transportation. It is a consumable in automotive use, mainly composed of water, alcohol, ethylene glycol, etc., and has functions such as cleaning, antifreeze, and anti-fog.

[DanteFitz]

I've been making my own windshield washer fluid for many years and find it super convenient and cost-effective. The basic recipe is 4 liters of clean water, a cup of pure alcohol like isopropyl alcohol or cheap vodka will also work, and a small teaspoon of dish soap or dishwashing liquid. The alcohol is mainly for antifreeze in winter, and the amount can be reduced in summer. The dish soap helps to easily wash away dirt. I just find a large bottle, pour in the water first, then slowly add and mix the alcohol, and finally add the dish soap to avoid creating too much foam. Shake well before use and then pour it into the car. Be careful not to add too much detergent, otherwise it may foam up and obstruct visibility when sprayed, and avoid using strongly alkaline substances that could damage the car's paint. Before winter, I always make extra and store it in the garage to prevent freezing and cracking. Overall, it's very simple, and the materials can be easily found at home.

[Xavier]

I personally prefer using eco-friendly windshield washer fluid because I'm concerned about the environmental pollution caused by chemicals in commercial products. My recipe consists of 4 liters of filtered water, half a cup of white vinegar to partially substitute alcohol's anti-corrosion effect, plus a small amount of mild liquid soap like eco-friendly soap for cleaning the glass. The white vinegar also helps remove grease stains. Although it's not as effective as alcohol in preventing freezing, with proper ratio control it can still work in slightly colder winter regions. When mixing, I recommend first stirring the water and vinegar thoroughly, then adding the soap drop by drop to avoid excessive foaming. The bottle can be recycled after use to reduce waste. I find that homemade solution not only protects nature but also saves money by avoiding pre-packaged commercial products in plastic. Each large batch lasts one to two months, saving time and providing peace of mind. Don't forget to test it on a small area of glass to check for streaks.

[EdwardFitz]

I found that making my own windshield washer fluid is a great way to save money. A bottle of commercial windshield washer fluid costs over ten yuan, but my homemade recipe only uses materials worth a few cents: 4 liters of tap water, a cup of inexpensive ethanol alcohol costing a few dimes, and a bit of dish soap for another few dimes. First, pour the water into a large container, then add the alcohol and mix well, and finally add a small spoonful of dish soap and stir slowly. Once done, pour it into an old spray bottle for reuse without waste. This way, I can easily save fifty to sixty yuan a year by making it myself in all seasons. The process isn’t complicated—just a few minutes in the kitchen, and you can adjust the thickness by adding more water. The key is not to cut corners by using dangerous substances like ammonia, which can damage the car’s window film. In short, it’s economical, practical, and flexible.