Because the dog has urinated on the couch. Either the dog is untrained or nobody has taken it outside and the couch was the first place the dog had to relieve itself.
Try a special enzymatic dog urine remover (available at any pet store). They work the best.
Put dog outside where they belong and buy a new couch, because urine has ammonia in it and the smell will never go away only fade. Well actually....you can use 1 part vinegar to 2 parts water. Vinegar will remove the enzymes that make the urine smell, oh that would be the ammonia, and the smell will go. You will need to keep the dog away from the couch until it is clean and dry though, and then make sure it does not happen again.
With more urine
well how would you get a urine stain on the couch anyway oh yeah you clean it that's how you get rid of it clean it :):)
No.
If your dog is still peeing on the couch, then you have not trained him/her well enough yet.
Spray with vinegar and ventilate the area.
Because you eat on the couch and drop things.
its not trained
Clean the couch with a mixture of vinegar and Pine Sol. That should remove the smell and the stain. D-Molish Now also does a great job of removing the smell and the soaked urine.
I Was also frustrated with this so i decided to remove the cushions from the couch and after awhile my dog stopped going on the couch
The dog is being dominate and possessive. The dog needs to be on the floor level and fartaher away from the couch, as height and closeness to either a person or object which the dog feels possessive of, results in more of this behavior. The dog is claiming ownership of the couch or the person sitting on it. The owner needs to let the dog know it does not own the couch, and that it is not allowed to be near the couch unless the owner invites the dog to do so.