Oh wow, we have been through THIS and I am sorry for you. A big help is to soak up as much of the urine as possible before treating it - by using towels over and over and stepping on the area to draw up as much pee as possible. I used regular towels I could wash and then paper towels until they were no longer picking up liquid- easy to tell with the paper. Then I got out a product we have here called "Outright" - essentially it is a bacterial enzyme that you dilute with water and wet the area. Something in it works with the bacteria to chemically change the odor producing bacteria and if you know where the area is - it works very well! Maybe you can find something similar if you read lables??