My Wiper Blades are Chattering
Q. I enjoy your column and try to read it as often as possible. My 2009 Chevy Suburban has a problem with wiper blades that chatter. No matter what manufacturer’s blade I try the problem still exists. The only time they don’t chatter is when I’m driving in heavy rain. The blade does not seem to flip over when the stroke changes direction. Any suggestions?
A. I would start with making sure the windshield is completely clean. In the past I have used Bon Ami powdered cleaner to fully clean the windshield. Then I would look at the angle of the wiper blade. The blade should be perpendicular to the windshield. Over time this angle can, especially if the wipers are not used for a long time. Using a flat jaws of an adjustable wrench gently twist the wiper arm to change the blade contact angle. You may need to experiment a bit to find the perfect angle.
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