The rear wiper blade on my 98 Explorer Sport only contacts the glass on the lower 1/3 to 1/2 of the blade. At first I thought I had a bad wiper blade so I replaced it. Now I've had a close look and realize the thing just doesn't touch the glass. I've searched the boards, the net, and the Haynes manual but haven't found a fix. Anybody have one?

I suspect the fix is to replace the wiper arm so I'll ask in advance if anybody knows what one costs. Thanks.

~Dan