"I have a puppy who just moved into my new house with me and I didn't discover until about a month after I moved in that my puppy had been using my diningroom rug to urinate all over. (it's the formal dining room, and not used very often) I was told by a store person to try this product and, even though it cost a bit more than I wanted to spend, I tried it. It took a little scrubbing, but this stuff took out all the stains and all the odor from even the oldest dried up spots!!! I poured the product on the rug and scrubbed with a nail brush, then used a rug scrubber with just water in it and it took everything out, no one ever knows that the rug had stains on it! (and it's a pale blue rug)"