I didn't swat mine on the nose. If I caught them in the act I'd say 'agh-agh-agh' and that would catch their attention enough to stop and then I'd put them on their pad to finish. If I saw the spot after the fact I'd say 'aww, who peed/pooped here?' with big disappointment in my voice. They learned very quickly that going on the pad meant they'd get a treat and that going anywhere else made me v-e-r-y sad
