I can usually quieten noisy wiper blades by twisting the arm very slightly to make the blade at contact with the windshield as nearly 90 degrees as possible, they are usually noisy in sweeping one direction. It must be done
carefully with a small cresent wrench or two so as to not damage the arm.

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xafman
1984 300TD 182,000 mi FOR SALE
1972 Chev Longhorn PU--restored
1994 Buick Roadmaster 7200 mi (actual)