I don't know how bad this person's couch is....but what we use to kill all type of smells from cooking, perfume, bathroom, dog smells, etc. is ZorbX, which you can get at Lowes. I think someone else mentioned this. Hospitals use this. Love this product. You may have treat the area more than once. I have asthma and most anything that has a smell bothers me. I rate this a miracle product.
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