My last roomate had a dog for about a month, but was very bad about cleaning up after him. Now my dog likes to frequent his old "hot spots." Today I scrubbed like **** with a resolve spray, and then used an enzyme cleaner on top of that, and later on he still tried to go pee there. Any advice on removing these hot spots? I mean it's nice to know where to look if he is going to "go", but I'd still like to focus him on going outside from the start.