What does "washer" mean in the context of cars?

When the term "washer" appears, it typically indicates that there is a shortage of glass water, and it is necessary to add some. Here is some information about glass water: Glass water is a consumable item used in cars. High-quality automotive glass water mainly consists of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants. Glass water can be classified by its state as either solid or liquid, with solid glass water being used in environments above 0℃. During the autumn and winter seasons, glass water should have excellent cleaning and antifreeze performance. When choosing a winter glass water, the antifreeze performance should be the main factor considered, and the glass water with an antifreeze point below the local minimum temperature should be selected.