I have a wall register for my AC that is currently blocked by a dresser. I don't really want to move the dresser, so I though about buying one of these air deflectors. In the past I have used a similar solution a with a floor register and it worked ok, but never tried it with a wall registers. Do any of you have any experience with these? Do they work? How should the air be redirected (I assume I should redirect the air up the wall instead of down toward the floor, but what do I know...)?