Our cleaning formula was designed to emulsify and lift stains off of the applied surface. Simply spray and wipe for most stains. For stubborn stains, use agitation with a soft detailing brush. For stains that still wont come out even with agitation, its likely that they have penetrated the coating of the surface and bonded to the raw material itself. In these cases, try spraying Interior Cleaner on the stain without wiping and leaving it to dry - once dried, spray the stain again to activate the dried solution, then blot and wipe the stain. If this still does not work to get the stain out, you will need to use a product that can penetrate the coating of the surface to get to the stain.