My wiper blades have been chattering non-stop across my windshield. I knew that when the blades get worn out that will happen, so I replaced the blades and its still happening. Thinking maybe it was just a cheap brand I bought a new brand, but it still chatters. So I've totally cleaned the windshield of any contaminants, that didnt work so I've messed around with bending and twisting the wiper arms to change the pressure on the windshield. I think it might be something loose from when I hit a deer a while back but I'm not sure. When I hit the deer it broke something with the wiper system and when I had my truck fixed the replaced whatever it was. Before I go removing the cowl and messing around with it I want to know if any of you guys might know something else that could be causing it.

Thanks in advance for any help.