Washer fluid in a car serves an important purpose in ensuring clear visibility while driving. It is a special liquid that is stored in a dedicated reservoir and dispensed through jets or nozzles onto the windshield. When the driver activates the windshield washer system, a small electric pump is triggered, which pressurizes the fluid and sprays it onto the glass.

The primary function of washer fluid is to clean the windshield by removing various types of contaminants. It helps to eliminate dirt, dust, insects, bird droppings, and other debris that may obstruct the driver's view. The fluid is designed to have a cleaning agent that helps dissolve and break down these substances, making them easier to remove. Additionally, washer fluid often contains a small amount of antifreeze, which prevents it from freezing in cold weather, ensuring consistent operation throughout the year.