dehumidifier?? personally I would replace it as the odor will never completely go away

A friend of mine used Tomato Juice on his basement concrete floor that was used as a litter box for 30 cats. That work to all our surprise. Not sure how you can with wood. I'm sue it's soaked right into every pore...

I would likely replace it (if possible) Another option would be to rent a commercial dehudifier like the ones used for removing water after water damage (like a burst pipe). Call a water removal company and talk to them about getting a machine. They are loud and hot but they work. Good luck!

The only real answer is to replace it. One humid day years later can bring a waft of that smell if you don't. Any other approach is just as much money with no real chance of being a true long term solution. A ''spot'' would be different. ''Soaked'' is ruined.

Can you imagine the state these people lived in if their floor is soaked with urine. Disgusting. I would gut / redo the whole thing, possibly the walls too.

Replace as much as you can. Sand down vigorously anywhere else.