If your wipers chatter in spite of new blades, your glass might possibly be choppy

https://www.mediafire.com/file/kyey1tmv6mbbd1n/pdf-8318-10081.pdf/file

If your wipers chatter in spite of new blades, your glass could be asymmetric. Replacement %%!%%470736ce-third-4109-b406-b201146ea44c%%!%% the root lead to for mushy, silent operation.