Solid Hardwood, Engineered and Laminate Flooring - Removed old carpet and pad...HELP

Hello. I hope I am posting this in the correct area.

We are having new carpet installed on Tuesday so today we ripped out all the old carpet and pads. These (as well as the subfloor) are severely stained with both dog and cat urine.

Our plan was to use a Cleaner/Disinfectant on the floor and then to use Kilz Total One primer before they lay the new carpet.

We noticed today that the subfloor is particle board and now are not sure we should be wetting it with the disinfectant.

Can someone please give me advice about this and also should we disinfect AND Kilz? Unfortunately, we are fighting both the stains and the odor (which is pretty bad right now).

Also, we didn't know to ask if we are supposed to remove the old pad staples and the strips of wood with those really really sharp nails in them. What do you think?

Thanks very much for your help.
Maria

You can mop the particle board with a damp mop with disinfectant on it, but do NOT get it too wet.
Hammer down flat or pull the old staples.
Add screws to any squeaky areas.
When it is thoroughly dry (you can help this along with fans), Kilz is a good idea. Brush the edges and roller it on. Make sure that the room is well ventilated.
Leave the tack strips in place. They can be used for the new carpet.
Good Luck!
Mike

Forum posters tend to report that 2-3 coats of polyurethane are effective for sealing in urine odors and stains. I have always used white shellac or a white shellac based primer/sealer like B-I-N which I find to be more effective than Kilz. Read and follow product directions for whatever primer/sealant you use. Apply 2-3 coats.