My driver-side wiper skips near the bottom of the downward stroke, leaving a large swath of dirty windshield in my line of sight. The skip occurs at speeds upwards of 20 mph. At highway speeds, both wipers shake slightly in the resting position. I suspect there is a great deal of turbulence just under the lip of the hood at the base of the windshield. Are there any aftermarket wiper spoilers or wiper wings available for the 2008 Aveo5 LS? What is the best wiper for this car?