We recently had a house fire. We are trying to restore items that have soot and smoke damage. We clean the soot and then ozone. I purchased a 20,000 mg unit. We had been borrowing a tool box machine. I don’t know it’s output. No markings but it had 4 ceramic plates inside. Our success rate has dropped in removing odors since using the one I purchased. Was the machine I borrowed putting out more ozone than the one I purchased?