Wiper Blade Element Check
WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of GENERAL MOTORS CORP.
Remove the wiper blade from the arm. Look down the length of the blade element. The rubber part of the element (2) that contacts the glass must be on the center line of the blade plus or minus 15 degrees (1).