Can anyone help please, we moved into our new home and the previous owners had dogs living on the upstairs landing. Apparently we found out that they use to wee and poo on the landing floor. It was that bad that the wee seeped through the floorboards onto the ceiling and it was dripping downstairs. The floorboards upstairs and ceiling downstairs have been replaced but the smell is still there. I have recently took up floorboards and soaked the joists with white vinegar. The smell has enhanced and it has been like that for a few weeks now. We have brought all kinds of products, i.e urine uv light, detergents to apparently eliminate the odour, pet products to get rid of it. Nothing is working and it is disgusting. If anyone could be of any help, it would be appreciated. The urine is old and has been sitting in the joists for quite some time.