I have a large male dog that has been marking in our house for a year. He got started when I brought a new dog into the group. Anyway my whole house smelled like urine! I tried all the other enzyme products and they helped. I ordered two gallons of My Pet Peed. First gallon when down three days ago with 60% humidity. Amazing smell is gone. I still get a whiff here and there so I am going to do another round this weekend. I am expecting to eliminate the Oder completly. I have probably spent $500 on the other products. This is the best $54 I have spent to solve this problem to date. YEAH!!! Happy Dance.