- Q
When the wiper is activated, there is a judder.
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A
This may be due to traffic film on the glass surface and deterioration of a coating. In that case, it is eliminated by decontaminating the glass with Glaco Glass Compound 'Roll On' and reapplying the Glaco again. Otherwise, the wiper may be causing too much friction, which can be remedied with Blade Reviver. Finally, the wiper rubber may be old and need replacement. Use Glaco Wipers to additionally create a water-repellent effect.
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