Hey guys, I was able to solve 95% of my chatter problem.
It's not your windshield that's the problem (though it helps), its the blades themselves, atleast it was for me. I didn't have to replace the blades though.
Take a rag, dampen it a bit and start rubbing at your blades, your rag is going to get a nice black streak on it. Keep rubbing and change positions on the towel to a clean area once in a while. Keep doing this until it is not leaving much of a streak anymore. Voila your blades should not squeak most of the time.
My blades are around 4 years old and only squeak when they first get wet.