Keeping your windshield clean is crucial for safe driving, and while store-bought washer fluid gets the job done, making your own offers significant cost savings and allows for customization based on your needs and climate. This comprehensive guide will walk you through creating effective DIY windshield washer fluid, addressing common questions and concerns along the way.
Why Make Your Own Windshield Washer Fluid?
The primary benefit of making your own washer fluid is the cost savings. Store-bought fluids can be surprisingly expensive, especially during winter months when de-icing agents are included. DIY fluid allows you to control the ingredients and the concentration, leading to a more affordable solution. Additionally, you can customize the fluid for your specific needs, such as adding extra cleaning power or adjusting the freezing point for extreme temperatures.
What You'll Need:
- Distilled water: This is crucial. Tap water contains minerals that can clog your washer nozzles and damage your system over time.
- Isopropyl alcohol (rubbing alcohol): For winter, this lowers the freezing point. The percentage needed depends on your climate (see below).
- Dish soap: A small amount of mild dish soap acts as a surfactant, helping to break down dirt and grime. Avoid using harsh detergents or anything with added scents or bleaches.
How to Make DIY Windshield Washer Fluid:
The recipe is simple and adaptable to your needs:
Basic Summer Formula:
- 1 gallon distilled water
- 1-2 tablespoons mild dish soap
Winter Formula (Adjust alcohol percentage based on expected temperatures):
- 1 gallon distilled water
- 1 cup - 1.5 cups isopropyl alcohol (70% or higher)
- 1-2 tablespoons mild dish soap
Important Note: The higher the percentage of isopropyl alcohol, the lower the freezing point. For temperatures below 20°F (-7°C), you may need to increase the amount of alcohol. Consult a freezing point chart for isopropyl alcohol solutions for more precise calculations.
Instructions:
- Combine the distilled water and isopropyl alcohol (if using) in a clean container.
- Add the dish soap.
- Stir gently to mix.
- Pour into your windshield washer fluid reservoir.
What is the Best Dish Soap to Use for Windshield Washer Fluid?
Many mild dish soaps work well. Look for brands without added scents or harsh chemicals. Dawn dish soap is a popular choice due to its grease-cutting abilities. However, any mild, unscented dish soap will likely be suitable. Testing a small amount first is advisable to ensure it doesn't leave streaks.
How Do I Make Windshield Washer Fluid for Winter?
As mentioned above, the key to winter windshield washer fluid is adding isopropyl alcohol. The amount you need depends on how cold it gets where you live. If you live in an area with temperatures consistently below freezing, you'll need a higher concentration of isopropyl alcohol to prevent the fluid from freezing. Refer to an isopropyl alcohol freezing point chart to determine the right concentration for your climate.
Can I use rubbing alcohol instead of isopropyl alcohol?
While both are alcohols, isopropyl alcohol (isopropanol) is specifically designed for use in various applications and is more commonly used in windshield washer fluid. Using rubbing alcohol containing other additives is not recommended due to potential damage to your car’s washer system. If you must use rubbing alcohol, ensure it's high-percentage (91% or higher) and does not contain any other additives.
Is homemade windshield washer fluid safe for my car?
When made correctly using distilled water, mild dish soap, and the appropriate amount of isopropyl alcohol (if needed), homemade windshield washer fluid is safe for your car. Always avoid using tap water, which can leave mineral deposits, and harsh chemicals that could damage your car's paint or washer system.
Conclusion:
Making your own windshield washer fluid is a simple, cost-effective, and environmentally friendly alternative to store-bought options. By following this guide and understanding the importance of using distilled water and appropriate ingredients, you can ensure clean windscreens throughout the year. Remember to adjust the recipe based on your specific climate and always prioritize safety.
