Getting smells out of chipboard subfloor

[Chasingsquirrels]

Actually I have no idea if subfloor is the right term, I have suspended chipboard floor and in the kitchen have had ceramic tiles down for 20 years.
Have just lifted the tiles as having LVT and there is a distinct smell of dog wee.
This will be from my dog who as a puppy wee'd in the kitchen overnight for a number of months. It has obviously permeated the grouting (and an area where the grouting had come out) and got into the chipboard.

From memory of having the LVT in the hall the installer laid a thin layer of plywood and then latex'd over then laid the LVT strips.

I'm assuming that once it's down the smell won't be noticeable (it certainly wasn't before the tiles came up).

But the flooring will probably be up for a couple of months due to various reasons so I'd like to do something about the smell if possible, and it would also be good to eliminate it just in case it would come through the LVT.

Any ideas?
I'm assuming I can't mop it as the chipboard would swell.
What about a very swift steam mop?
Any dry product which would be applied?

I would replace it. You will never get rid of the smell.

CAnt you replace the bad bits of chipboard?

I second replacing it - I suspect you will find that the floor will rot eventually because of the wee. If you really can’t replace it then you could try bicarbonate of soda

I think replace too.

🙁 that's not what I was wanting to hear

Try dousing the area with white vinegar.
As the vinegar evaporates it'll (hopefully) take the offending smell with it.

Probably best to try overnight!

But thanks for posting

I'm googling (why didn't I do that first??) and there seems to be a few suggestions so I'll give them a try first.
Flooring guy is hopefully coming next week to look at the finish once now the tiles are up, I'll see what he says about new chipboard if I get nowhere with the suggestions I've found.