Hi.
I am never fully happy with my removal of urine stains from carpets. I usually pre spray, and if need be use a small flood removal tool attached to the hose from the truck mount. I apply a Urine neutralizer as well, but quite often the actual yellow staining is still there.
I have a few urine stains to do tomorrow, so my question is:- is there something else that I can do to try and remove the yellow staining from the carpet after the cleaning, or does the urine dye the fibers of the carpet over time, and so become impossible to remove?

Thanks