How do I remove pet urine stains and smells from car seats?

Act as quickly as possible. Blot up as much liquid as you can without rubbing, then clean the area with a fabric cleaner or an enzyme-based pet stain cleaner, which breaks down the compounds that cause the smell. Agitate gently, then extract or blot the moisture thoroughly, because urine that soaks into the foam will keep smelling. Avoid hot water and strong household chemicals, which can set stains and odors. Test the cleaner on a hidden area first; deep or old stains may need professional extraction.