http://www.youtube.com/watch?v=PHTjwpC44zo

 

Watched the video now a second time and still don't see the point you seem to be trying to make.

 

Rain-X will likely solve your problem.

 

it's quite simple actually.
he's wiping WET windshield. it wipes one direction, (clean), jumps in the opposite.
Guy in the video wipes dry windshield, shudder is exaggerated. But it's a good example of what a non-plumb wiper will do.
mof, I have at least one wiper on my pickup do same thing - shudder one way and wipe clean opposite. I am going to fix it as soon as I am done typing.

 

before:




and after:



smoooooooooooooooooth..

 

maybe I'm blind, but I can't see a difference...please let me know what I'm supposed to be looking for

 

Look at the angle between the blade and the glass.

 

Has anyone else noticed that the "After" picture is time stamped 5 minutes earlier than the "Before" pic. ?

 

So the op bent the wiper arm to make the point...