Windshield washer fluid is a liquid solution used to clean windshields on vehicles. It is typically made up of a combination of water, detergent, and other chemicals that help remove dirt, dust, and grime from the windshield surface. Some windshield washer fluids also contain additives such as antifreeze, which helps prevent the fluid from freezing in cold weather. Other additives may include corrosion inhibitors, which help protect the vehicle's windshield wiper system from damage caused by rust and other corrosive elements. Windshield washer fluid is typically stored in a reservoir under the hood of a vehicle, and is dispensed through nozzles located on the windshield wipers. The wiper blades then spread the fluid across the windshield to clean it. It's important to note that not all windshield washer fluids are created equal, and some may be more effective than others depending on the specific application. For example, some windshield washer fluids are designed for use in cold weather and may contain a higher concentration of antifreeze, while others may be formulated for use in hot, dusty conditions and contain additional surfactants and cleaning agents to remove stubborn dirt and grime.