Windscreen wipers are a game mechanic that allow the player to clean the windscreen of their current vehicle, so as to get better visibility in first person when driving through snow, rain, or dirt. They are activated/deactivated by pressing up on the D Pad on consoles and the up arrow key on PC.
The effectivity of windscreen wipers often depends on the type of car that the wipers are mounted to. Newer, more luxurious cars tend to have the best quality wipers, while older vehicles (Such as those in the MCP's ownership.) tend to be not as great, but still mediocre.
Windscreen wipers can break if you crash head on into something such as a wall or other vehicle too fast, so be careful when driving in first person in thick snow, rain, or dust.
Wipers can not be shot or broken off with any weapon.