I've tried all sorts of wiper blades on my I35, from el cheapos to expensive beam style ones, and they all chatter within a short period of time. The windshield's been cleaned and clayed multiple times and I've torqued the wiper arm nuts to spec, all to no avail. I'm beginning to think the windshield itself is at fault. It's sandblasted in certain parts and at night, I can see swirls of scratches. None of this impacts visibility, though. From the appearance and Asahi imprint at the bottom, I wouldn't be surprised if it's the original 14 year old windshield.

Has anyone had bad glass cause wiper noise before? I don't have any problem replacing the glass if it indeed is the culprit.

 

Not the windshield.
Do they chatter when new, if not clean the rubber with 409.
Sometimes the tension loosens up on the arm after a period of time, also make certain the rubber is 90 degrees to the glass. If not, twist the arm.
Silblades are great, and come with a 5year warranty.

 

Have you tried applying stuff like rain-x? The extra "slickness" should make them work smooth. I don't even bother using wipers if I can maintain speed.

 

I've had the same problem with my 2004 I35 for the past 3 years. I also tried several different brands & types of wiper blades but the chatter still exists. I believe the spring on the wiper arm is worn & isn't applying enough pressure. At this point I've just learned to live with it.

 

I may have found the solution. I found the youtube video below & many, many posts on other forums that state bending the wiper arm to the correct position fixed the problem. I'm going to try it this weekend.