We use a product called Wee Cleaner -- for our past Yorkie and for my brothers cat who had a bad bout of attitude towards my brother for a few months last year (she peed on the couch three times) and it works like a CHARM!
Wee Cleaner | 1-Gallon Bottle
I recommend the gallon. LOL. It's always good to have on hand.
Right now, the code SPRING13 will get you 10% off.\
And the code 5OFF2 will get you $5 off if you buy 2 gallons!