90. Slippage
1. Rubber working elements are dirty.
2. The edges of the brushes are frayed, the rubber working elements are worn or torn.
91. In the cleaning field, the remaining water immediately collects in drops
1. The windshield is dirty with varnish or oil.
92. The brush cleans one-sidedly - good on one side, not on the other
1. The rubber working element has one-sided wear.
2. The wiper arm is twisted, the blade does not fit exactly on the glass.
93. Uncleaned surfaces
1. The reliability of fixing the working element in the brush frame is broken.
2. The brush does not adhere to the glass evenly.
3. Lever down force too low - Lightly lubricate wiper arm pivots and springs or install new arm.
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