What is the function of a windscreen wiper?
Correct answer: Fluid removal

Player #97184361
Tom, If I wanted to be picky and disagreeable I would ask why the question couldn’t be. worded differently like Screen cleaner as some would easily recognize. !!!

Tom
It is liquid removal. Fluids include gases, and it is not needed to remove air, a fluid.
A fluid is something that deforms under lateral force.
A liquid is a fluid, but not all fluids are liquids.