How do I remove urine stains from hardwood floor?

http://www.dogingtonpost.com/what-to-do-about-dog-urine-on-your-hardwood-floors/

This seems to be a popular question, as I’ve posted the directions three times in a week, so find a tiny bit of comfort knowing you are not alone. Anyway this is a tried and true technique that takes some time but really does the job so you don’t need to revisit the issue in a month. Following is the article that I’ve quoted each time along with the link to the site carries the product along with several others that also work, but I don’t think as well.

“Urine-Erase is an enzyme based product that is guaranteed to remove urine stains and odor, regardless of age (even 30 year-old set stains)! This unique product works on mattresses, upholstery, leather, carpets, drapes, floors (wood, cement, terrazzo), walls, kennels, etc. Manufactured since 1978, you won't find a better product to eliminate urine odors and stains.

Urine-Erase uses a two-step process. First, a dry enzyme powder is mixed fresh with water. This solution is poured onto the surface and breaks down urine so it will react with the bottle of solution (gentle peroxide) that is applied approximately 8 hours after the enzyme. Stains and odors disappear within hours after the second step. A chemical reaction breaks down the urine into water and oxygen. Urine-Erase is ideal when indoor air quality is a concern.

Better Than One-Step Systems: Bacteria feeding on urine causes odor. Many one step products will destroy or neutralize bacteria but bacteria will return to the urine and the problem reoccurs. Most products will treat only the odor - but not the stain. Urine-Erase attacks the urine in 2 steps and changes it into an evaporable gas of water and oxygen. Odors are completely and permanently gone. (Note: physically damaged or bleached fabric cannot be repaired by any product.)

How it Works: Urine-Erase is an enzyme based formula developed to break down and eliminate urine (human, cat, or dog) from washable fabrics, mattresses and carpets. Urine-Erase is simple to use. Follow this two step process to effectively use Urine-Erase to to remove urine stains and odors:

1. Mix enzyme (under cap) with 2 cups water and let stand 15 minutes. Pour over urine soiled area, walk away (soak overnight for 8 hours)
2. Pour #2 solution (in bottle) over area. Let dry. Vacuum. It’s that simple.

Simply pour on and allow the solution to follow the same exact path as the urine did originally. You need to apply a volume of Urine-Erase in an amount equal to the urine. Order the economical 1 gallon size when treating large areas. This is the equivalent of 8 standard size bottles - providing a 50% cost savings. Always test any stain remover on an inconspicuous location first before using.”

https://bedwettingstore.com/urine-erase-stain-remover.html

Lma, Hello. First try some vinegar, sounds like the beginning of mold maybe? Then wash it with Murphy's Oil Soap, it's in the cleaning isle. Let each step you do, let it dry completely. Keep the rug off the floor while it dries. Murphy's Oil Soap is just for wood, follow the directions on the bottle. Aloha!

Try hydrogen peroxide.

Hello Lma: What I used was a product called Odormute. It's a granule, and you mix it with warm water. Spray it on the stain and let it dry. It's an enzyme eater, which is what you need, and it doesn't have it's own smell so it's not covering up a smell, but eliminating it. You can get it at, most likely, at Walmart, some pet stores and on-line, It's environmentally friendly and you can even wash your cat with it if the cat gets skunked :) I've used it for years with great success and recommend it highly. It also removed most of the stain. If you still have stain left, soak the area with hydrogen peroxide and let it sit for a few days. You may even put a washcloth over the stain and keep it wet with the hydrogen peroxide. Don't over soak the cloth as you don't want to raise the grain of the wood too much. If it does raise, just sand it smooth, going with the grain, not against or in a circular manner, and then restain with a matching stain of the rest of the floor and seal.