It seems like this happens after lots of people shampoo, I wonder if the shampooing spreads the smell around? I did the regular steam cleaning when Joey was about six months old, and then used Natures Miracle in the tank for the final pass through, this seemed to work. Remember they will "mark" on surfaces where they can smell any protein; both urine and poop contain protein, sometimes they will even mark on a food stain. Marking is lessened by neutering and the smell isn't as strong, but male dogs will still mark under certain conditions, so if you can get these smells up, I think the marking will stop. |