If you have a problem with wiper blade function, first clean the blades and windshield before throwing money at new blades. I use Bon Ami (and Rain-X) on the windshield, and alcohol to clean the blades. This often solves the problem.

In the last sleety storm we had I found a barrelful of wiper blades tossed in the trash outside the auto parts store. I took home about 15 blades and found most of them still in excellent shape. All I have to do is trim them to size. I don't think I'll have to pay money for wiper blades ever again. (Also good for the environment - less waste.)

Every so often I flip the blades on my cars so they undo the set they take in the parked position.