We have very light colored grout and during house training our dog she had some mistakes, most came right out but we have a 4′x3′ section that is stained dark and just won’t clear up. I have tried everything from Nature’s Miracle which usually does the job minus this one spot. I then tried Comet mixed with water and scrubbed the paste into the stain and let it sit for a while. Stain was still there so I tried liquid bleach, let sit, cleaned out, Stain was still there so I tried Muriatic Acid (dilluted and full strength) neither worked. The muriatic acid looked like it was working, it bubbled up and it looked like it was pulling out the urine due to the yellow color it turned but after 24 hours the grout is dry but still a dark dirty color.

So I am stumped, none of those options I have researched and read about worked. I really want to avoid pulling up and regrouting that area so if any one has any other ideas or tips to get this stain out of our grout it would be much appreciated.

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Filed under: Urine Stains

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