Thank you for sharing your experience with smells and ozone machines! Although this discussion is from a while ago, I wanted to tag in @Mike-And-Jane0 so they can get a notification of your reply and see your advice on the matter. 😊
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I purchased an ozone machine after a tenant saturated the rental house with feces and urine soaked into the floor. After the house was cleaned and sanitized professionally, the smell of urine still permeated the house. I turned on the ozone machine and left it on for 3 days in the vacant house. The smell diminished immensely. I was really surprised how well it worked. You have to make sure to removed all plants and animals before you turn on. Afterwards it advises to open windows for 30 minutes.