The refilling frequency of windshield washer fluid should be adjusted flexibly based on actual usage and seasonal changes. It is generally recommended to check the fluid level every 1 to 2 months. Vehicles with frequent wiper usage (such as those used for urban commuting or driving during rainy seasons) may require shorter intervals, while less frequently used vehicles can extend the interval to 3 to 4 months. New cars have higher cleaning demands after the break-in period, so the first refill is recommended within 1 month. The fluid level can be determined by the dashboard indicator, changes in spray flow and sound, or by directly opening the engine compartment to inspect the scale line on the blue-capped reservoir. Although local temperatures may be high, antifreeze-type fluid (with a freezing point at least 10°C below the local minimum temperature) should be prepared when traveling to high-altitude or cold regions. Note that tap water should not be used as a substitute, as its mineral content may clog nozzles and corrode tubing. Concentrated products must be diluted according to instructions, and the fluid level should be kept 1 cm below the filler neck to prevent overflow. It is advisable to always keep a bottle of washer fluid in the vehicle for timely refills, ensuring clear visibility and prolonging the wiper system's service life.
