My pup Buddy is doing very well on housetraining. He has had an accident inside though, and I can't seem to get rid of the smell. I thought I cleaned it up very well, but I can still smell it. I've always had a very sensetive nose and I don't care for it one bit. I live in a two bedroom apartment, and the landlord isn't going to be happy if he smells dog pee. What should I do?