We love our cats, but when they stop using the litter box and have messes it's time for serious action. No product works faster to get cats back to using the litter box and remove messes from urine, vomit, hair balls, feces, marking scents and cat spray. You do not wipe this product up after applying. Let it air dry. Do-Not add more liquid before five to seven days after initial application. Adding more Dumb Cat liquid before this period will stop the product from working. Dumb Cat is the most effective cat urine remover available. Retrain cats to use litterbox while using Dumb Cat. Cover treated area to prevent cats from returning until issues are removed. Do not allow cats to roam free until their scent confusion or behavior issues are corrected.