I recently got my left side to stop chattering on the up stroke by
twisting the arm a little to change the angle of the blade, so that it
would flip properly.
It's very stiff steel and does not change shape easily.  I used two
cresent type wrenches on the thin part of the arm and avoided stressing
the other parts.

Now if I could just get my washers to squirt...  Had a challenging drive
into a Michigan snowstorm Thanksgiving morning.

Larry A.

Wesley Pegden wrote:

> A couple weeks ago I picked up a pair of bosch excel wipers (they were
> on sale).   The left side chatters and is ineffective unless the
> windshield is totally drenched.  I tried switching sides, and I had the
> same problem (again on the left).  What wipers have worked well for
> people?
>
> Thanks,
> Wes
>
>