Wipers don't clean glass well?

Poorly cleaned glass prevents the driver from seeing the road, which increases the risk of traffic.

Most modern passenger cars have curved windshields. The basis for effective field-of-sight cleaning with rubber wiper blades is to ensure a constant, evenly distributed and appropriate pressure force of the wiper rubber on the glass surface.

Each wiper arm is pressed by a spring, and the hinged eraser is pressed against the glass by a flat spring.

One of the common reasons for leaving surfaces unwashed is the uneven pressure of the rubber on the glass. At the point of contact of the shoulders with the rubber, the pressing force is greatest, and the rubber is less pressed between the shoulders. This leads to accelerated wear of small areas and the formation of unworn surfaces. It should be added that the rubber element with the spring must be firmly fixed at one end, and all other clamps must be loosened in order to be able to follow the curvature of the windshield.

Poorly cleaned glass prevents the driver from seeing the road, and therefore increases the risk of traffic.