Getting Rid Of Cat Urine Smell

I tried to wash my couch with all kinds of cleaning products and can not get rid of the smell. Is this really Urine Be Gone? Since I gave my cat away, but you want to get another. I know that cats pee where there is the smell of cat urine others.
Help!

Spray the area with white vinegar and soak up the moisture with a clean cloth. Repeat as necessary. The vinegar to neutralize and eliminate odors.

Try the vinegar ... Mix it with a little water and rub it!

Zero Pet Odor really works well. You might have seen advertising on television. I think you can order it on television or online ZeroOdorPet.com.

Arm & Hammer carpet cleaner pet oders. Sprinkle it and leave it for a while, depending on how the smell is bad and vacumn up. You may need to do more than once for real bad oders, I used it and it worked. Micro

BY TWO TONS of lard and rub gently on your eggs also counch LIQUID.