Before use, test the surface to be treated by applying the solution to a hidden area to protect the color. Wait 5 minutes, then wipe with a white cloth. If the color is removed, do not use Nature's Miracle® Ultimate Stain & Odor Remover on that surface. Do not use on hardwood, leather, velvet, silk, or wool, or porous stone/ceramic surfaces. Always use this product undiluted. To remove stains and unpleasant odors: wipe off as much dirt as possible, then thoroughly soak the affected area with this product. Saturation is important for this product to penetrate deeply. Leave it to work for 15 minutes, then wipe the stain with a clean cloth. For stubborn stains: gently wipe the stain before allowing the product to work for 15 minutes. Dog Odor Remover