I have the big 10 bissell carpet shampooer. With 1 dog and 4 cats, one which vomits a lot, I purchased this cleaner formula. Although it says for smart fill, I just remove the little plug and pour the amount needed in the cap. I was shocked at the way my rugs came out afer one time with this cleaner! It removed Stains in my beige rug that I never could get completely out and never thought they would ever come out! The rug looks like new! I will always use this in my carpet cleaner machine. Awsome!!