Just finished our first haunt, and we constructed several fog chillers (because we never quite got one right). Has anyone ever constructed a fool-proof chiller? We particularly had problems with them leaking after the ice melted. Also, since we are using it indoors, any recommendations for a good fog that provides the nice "cemetery effect"-ie low lying fog without either having slippery residue on the floor or fogging the entire haunt too much-this is an old movie theater, so the ceilings are high, and the room is pretty big, but just have a couple areas that we want to fog. Thanks in advance for any advice. I personally would rather spend a little money and not have problems, so even a good one on the market would be fine.