I've used this product for years. When I lived on an Indian reservation (for 5 years) I rescued 44 dogs, many were puppies. And my own two were sometimes guilty as well. I would first use the Spot & Stain, then saturate with this product, cover with a clean, white, wet cleaning towel. After a couple of days when the towel was dry, you could see the urine that had been absorbed into the towel but had been deeper into the carpet where most cleaners can't get. Remove towel, wash for next time. If you have pets, this is a "must have" cleaning product!