Get Smoke Smell Out Leather Couch

Just read an article about how to get smoke smell out leather couch from the Herald & Review. https://herald-review.com/lifestyles/family/everyday-cheapskate-removing-smoke-smell-from-leather-couch/article_f6ee22e7-3f21-5351-b4c1-0e7fbb91f215.html
The point they stressed was that the pores in the leather are very close and run deeper than fabrics. It will take time and effort to remove the smell with several applications of the product. Persistence was the key. In the article, the product Nok Out Odor Eliminator was mentioned. Here is a link if you would like to check it out.
NOK OUT Odor Eliminator – Multi-Purpose Odor Eliminator & Cleaner (16 oz.)
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Nok Out works because it is an oxidizer. It changes whatever the cause of the odor is into something that has no smell.
This product sounds like it has a lot of potential for removing odors in your home besides smoke. I believe you will find it worthwhile to discover its other uses.