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Step 1
Determine if the stain has penetrated the wood finish. If you catch urine before it has seeped below the surface, you have a much easier job on your hands. Use water and a mild disinfectant if you are dealing with a fresh stain. Read on if you have something more permanent to deal with.
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Step 2
Strip down the stained area by sanding off the wood floor finish. It is a good idea to go ahead and strip and sand the entire wood floor, but this is much more time consuming.
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Step 3
Create a stain removal solution. Mix together 1 cup of hot water and a tbsp. of oxalic acid. Make more solution if you have multiple stains, but maintain the same ratio.
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Step 4
Pour the stain solution on the wood floor. Apply the mix generously; this is not a time to "use sparingly." Leave the solution on the floor overnight (or for at least several hours).
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Step 5
Wipe away the oxalic acid mix with warm water and a sponge. Your stain should be gone or significantly reduced. Repeat Steps 2 to 5 if you are not happy with first-round results.
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Step 6
Reseal the wood floor with finish. As a preventative measure, consider upgrading to a newer finish if it's within your budget.











