Even modern aircraft don’t have screen washers like cars. They are of course less prone to picking up dirt than a car. However when they do need to be cleaned it’s done like this…with special cleaner fluid.The pilots’ screens are usually made of three independent layers of glass each reinforced to enormous strength. Even if two layers shattered the screen would be strong enough to do itsjob You will also see that on each side there are two small windows that are open. These are the direct vision windows. For people who are claustrophobic knowing that these windows can be opened in flight can be a source of great relief.