- Q
After applying Glaco, the wipers judder.
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A
This may be due to traffic film on the glass surface and deterioration of the 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.
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