[asshanson]

Really? When I'm at least moving in snow/rain conditions it never builds up on the rear glass, I only use it when I start up the car after it's been sitting in snow. Even if it's been sitting in the rain it runs off immediately, never sticks to the glass.

If I'm on the highway it can be raining and my back hatch will be completely dry. I wouldn't mind getting rid of my wiper if the spoiler didn't have a big notch in it.

EDIT: I would guess rain/snow buildup on a DSM would be worse than an EVO because of the angle of the glass, but it's just a guess.