Spray No SCRATCH on areas you wish to protect. Apply daily for a few days, then as needed, depending on the severity of your pet's habit. No SCRATCH is safe and non-staining on almost all materials. However, before using product, test on a small inconspicuous area of the surface. To use on screen doors, windows or non-fabric surfaces, tape or pin a cloth to the screen or vertical surface, then spray. No SCRATCH should not be sprayed directly on any leather or suede material types.