Can Windshield Washer Fluids Be Mixed?

[Lydia]

Occasional mixing is acceptable. Different windshield washer fluids have varying ingredient ratios, and mixing them may produce impurities that could clog the nozzles. However, occasional mixing generally doesn't cause significant issues. Below is relevant information about windshield washer fluids: 1. Main components: Deionized water, alcohol, ethylene/propylene glycol, methyl ether, protective agents, surfactants, dyes, etc. 2. Functions: Capability to clean stains without leaving water marks; dustproof and antistatic properties make surfaces less prone to dirt accumulation after cleaning; antifreeze properties; corrosion resistance that won't damage glass or vehicles; winter-specific formulas additionally provide antifreeze and antifog capabilities. 3. When mixing is acceptable: Purified water can be added during summer or warm weather; emergency situations may warrant occasional mixing of different fluids; same-brand antifreeze washer fluid can be mixed with summer formula. 4. When mixing should be avoided: Avoid randomly mixing different brands; winter formulas in northern regions should preferably not be mixed; never substitute water for washer fluid in winter; if fluids must be mixed under special circumstances, remember to drain the mixture at night, especially in cold weather.