The spray and let calm again by sleep one night. Although our cat tries to scratch repeatedly at the door, but when he hears it hiss he seeks a new job. Gizmo (our cat) not doing sharpens his claws, but it is this boredom scratching if he suspects something interesting behind a door. He takes not even for his claws, at least so far we do not have any marks on our door. But wean he unfortunately does not do it well. He tried it again about every 3-4 days. So I'm probably a little longer depend on this product, and I hope that I can relate it even long.