How do you remove dog urine stains from a fabric sofa?

First, make sure all of the urine is soaked up using rags. Clean the area with a mixture of 7th Generation Dish Soap and warm water. Scrub the area thoroughly with a clean white rag. Rinse the area and make sure you get all of the dish soap solution washed out. Dry very thoroughly. Then do the same thing all over again (dry, clean), but this time with a mixture of ½ vinegar and ½ water. This will work on the odors (vinegar neutralizes the ammonia smell of the urine). Dry again very thoroughly. The last step is to sprinkle baking soda liberally all over the entire area and let it absorb all the moisture and smells. Leave it on until it is completely dry, or at least an hour, whichever is longer.