Originally Posted by fz6rider

I too had this chatter problem, the chatter lasted for a couple months. It started when it started getting cold so I thought it was just the cold weather. However recently they stopped chattering however the middle of the blade was not contacting the windshield, so there was a swath that did not get wiped. I started looking around on this forum for a solution, I found that one should torque the arm with a wrench to correct the angle of attack of the wiper.

The angle of attack is the problem, however I was not about to torque my wiper arm without further investigating the problem. I took off the plastic cover and unbolted the one nut that holds on the wiper arm. The arm looked good to me but I noticed that the mount wiper arm is curved and has notches, which can be used to adjust the angle of attack (I am assuming). I put the wiper blade back on, rotated it to where I thought it should be, tightened it down and test it out. Worked perfectly.

I think what happened was that when it got cold the mount slide one notch over and the chattering started, then I must have tried wiping snow or ice and it moved it a notch or two which really made the problem bad. I tell my gf never to use the wipers to wipe snow or ice, I need to listen to my own advice. Anyways hope that helps some people, let me know if that does not make sense.