Have tried longer and shorter blades. Also different types and brands. They only chatter in light rain not when really wet.
Try triple edge wipers. Not only are they covered by a lifetime warranty but they are impregnated with a silicone that acts like rain x and sheds water and prevents the chattering your talking about Haven't seen one set of these chatter yet
OK, before you go throwing countless dollars away on the rain-x and hi-dollar wiper ideas, think about this, and I'm not trying talk down, but sometimes we forget the obvious. Your wipers are rubber, and the windshield is glass.the problem is, the wipers are hardening a bit and actually 'grabbing' the windshield when they pass. The easiest fix is to a) treat the wipers with some household glass cleaner, the ammonia will soften the rubber, or b) run 'delayed' wipers in accordance with the rainfall, eg. don't run them full blast in a light drizzle.
Try this, G M recommends that you clean your windshield with Bon Ami. use a soft cloth and clean it good, then rinse and dry it. Then clean with regular window cleaner. The Bon Ami removes road film that window cleaner won't touch. I follow this with a coat of Rain X windshield wax. I only have to use the Bon Ami about twice a year and the wax lasts about six weeks in the winter. Do not use any other cleansers (Ajax Comet etc. they scratch glass, Bon Ami doesn't) Also wipe your blades with window cleaner.
