fox peeing over patio

does anyone know how to deter a fox from peeing all over? I feed squirrels on the patio, and recently a fox has figured out it's a squirrel hangout, and it's been peeing and marking (both) all over the patio, the steps right outside the doors so I can literally smell it inside, the birdbath??, next to my birdfeeder... is there a way to spray something that'll deter the fox?