Afraid to say I might not know the complete and technical answer or maybe I just haven't come across serious enough urine stains..Any advice on getting the yellow pet urine stains out of carpet? Any advice will help. I can lighten it but it doesn’t come totally out.
Do you have any pictures or more info? Sometimes little nuances matter. Was the urine coming from the dog being on antibiotics, how big is the stain , did you use spot lifter to eliminate stain, does the padding have a moisture barrier and such. We've been talking about mitigating urine salts on many occasions and there are so many ways how to deal with it, from OSR and bucket method ( the most effective for some members) trough UPT- Pro's Choice or using stain remover
( peroxide based - I prefer Prochem)which might require additional visit after application, covering it overnight and revisit it next day and rinse it out. I carry minimum of 5 products for urine treatment, that includes Odorx, Unleashed , Pro's Choice Os-1, which is also great for old blood spots and Odorcide , formula 210, which works great for smaller areas . Spray liberally on dry carpet, roll it in and repeat if needed. That's done in case when customer is not open to idea of pulling out carpeting and removing padding... it has nothing to do with taking out stains.