Hi Loula

I have had a similar problem with one of my furbaby cats - I expect the smell won't be as bad with your dog but still bad enough. I have found success with using an enzyme based washing powder such as BioZet etc - damp it onto the area and rinse out with a wet cloth as well as you can, using a dry cloth to dry out as much as possible. The enzymes will break down the proteins in the urine and therefore get rid of the some of the smell (apparently!). Once it is dry, I then use Febreeze on the area - you can get it at the supermarket - it should get rid of any lingering odours. Hope this helps you.

Cheryl