Sounds like I just need to pull it all apart and see which piece is sloppy. It is probably the joint right at the wiper motor, since both wipers do it. I can sort of fix the passenger side by moving it a spline, but the driver side slaps the bottom of the window and the top so any change makes things worse. I guess this is just one of those things you have to deal with in Oregon, since we use our wipers so much they just wear out.

"Time and tide melts the snowman"