What's in Windshield Washer Fluid That Keeps It From Freezing?

Munawar asks: What do they put in windshield wiper fluid to keep it from freezing? Although there are other additives that are also sometimes used for the de-icing component in windshield washer fluid, the most commonly used ingredient is methanol, which combines with water, a dash of colored ink, and occasionally some form of detergent to make up windshield washer []

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