Removing Cat Urine Odor from a Couch

I thought I had deodorized my microfiber sofa, but continued to smell cat urine, especially when on the floor playing with my toddler. I turned the couch over and behold! The carpet was covered with stains caused by urine seeping all the way through the sofa. I treated the carpet, and the smell went away.

By the way, I have noticed that my diva of a cat only urinates on the sofa when her litter box does not meet her demanding standards, so daily scooping and frequent changes have eliminated the sofa problem--or so I hope.