No problem. It really should cut down on the number of times that he scents. Still, make sure you get all of his spots thoroughly cleaned! Even females scent, although they are not as destructive because they do not lift their little legs on valuable items (and they don't make bleached spots on the grass.) Also, every time you catch him in the act, yell at him and make him afraid! You don't have to hurt him, but make him jump and KNOW that you mean business. If your strong, deep, and commanding "NO!" is not enough to strike fear into his little Yorkie heart, sharply stomp your foot and make a few hurried steps towards him like you are going to rip him apart if you catch him (this ALWAYS does the trick with my little one, especially since she's a more timid specimen of the breed to begin with.) If you don't do this consistently every time you catch him, he will continue to be naughty. Dogs are just like children and they know that if they can get away with something once, they will try it again and ignore and laugh at your weak authority. I hope that everything goes well for you two. Good luck with him!!!
