Washer Fluid

Windshield washer fluid (also called windshield wiper fluid, wiper fluid, screen wash (in the UK), or washer fluid) is a fluid for motor vehicles that is used in cleaning the windshield with the windshield wiper while the vehicle is being driven.

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Hidden in plain sight: Windshield washer fluid is an unexpected emission source

Hidden in Plain Sight: Windshield Washer Fluid Is an Unexpected Source of Vehicle Emissions