coloring the window

Two weeks ago Samuel was upstairs while we were doing school. I came up for some reason to find that he had drew on the back porch window with white crayon. Lovely. I got my handy Norwex cloth wet and set him to work cleaning it up. I left him for like two minutes, seriously, and came back to find him finished but the norwex cloth was no where to be found. I asked and asked where he put it but either he didn't understand me or he couldn't tell me...or he was being naughty. I looked high and low and could not find it. I mean I looked in every drawer and possible cranny. No where to be found! Two weeks later it still hasn't shown up. I have no idea where it could have gone. The punk is still a destroyer baby.