We cleaned and cleaned and cleaned the apartment after tenants moved out and left it a mess as usual. But after we went back three days later there was still smell in the house. Unfortunately we didn't have time to search for the smell. People were on their way to look at the apartment. So for a temporary fix I ran down to the local gas station where they had Renuzit aroma of apple cinnamon. After waving two of these around for twenty minutes the apartment smelled great later on that evening after renting the apartment, we found a problem it was behind the refrigerator and it wasn't nice.