My parents managed a 480 unit apartment complex. One male tenant moved out and when we walked into the apartment and everything was immaculate. When I went to make sure he had not forgotten anything, opened up the bedroom closet and was greeted by hundreds of mason jars of urine. Each and every closet and cupboard held the same treasures. We had to call in a bio hazard company and a dumpster just to take all the jars.