we sprayed Daconil weather stik on a lawn. The customer is spitting mad... "We've been scubbing the sidewalk and the side of the house for an hour and a half, and can't get it off!" The chemical leaves a thin white wash over areas where it touches, he noticed it on his stained, and sealed walkway, vinyl fence, and even on some of the brick around the house. I need some advice on what I can use to remove this stuff.. anyone have any experience with this? The color is barely noticible, but he's VERY picky. I'm going to go see him in the morning..