Remove Urine Stain From Mattress Mix & spray on. Must use within 20 minutes -do not attempt to store the remainder in a closed bottle. It works by producing by-products that are only active for that time period anyway. Mix: about 8 oz. Hydrogen Peroxide & 3 tablespoons baking soda & a drop of liquid dishwashing liquid. Mix well & spray onto stain, within 5 minutes stain will be gone. Works on older stains too.
How to Easily Remove Old Pee Stain and Smell from a Mattress