I usually add marking dye to my weed control. No more!!!! Got a call from my customer saying she was trying to wash it off her cat and herself. She was shrubing and it would not come off. A little of it got sprayed on the side of the house at the bottom near the weedy flowerbed and she was also trying to get that off. She was pissed. I told her sunlight will break it down. She says if it dont come off that she wants the siding replaced. No more dye for me. Anyone have a problem with this stuff?