W: wet/water cleaning only. The baking soda will work to deodorize the stain. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. First, he suggested spraying the couch cushion with a natural deodorizer like white vinegar, and then placing the cushion in a garbage bag. Then, mix 2/3 cup of rubbing alcohol with 1 tablespoon of vinegar. Cleaning cushions outdoors is great for avoiding messes in your home, but you can get the foam dirtier if you arent careful with it. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. When your cushion needs some extra attention, give it a deeper cleaning instead. References. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Step #2: Deodorize. For example, you could mix 1 cup (240mL) of hydrogen peroxide, 1 teaspoon (4.9mL) of white vinegar, and 2 tablespoons (28.80 g) of baking soda into a paste. If the couch pillows are foam filled and are removable, you can unzip those as well. Another option is to use an upholstery cleaner. You may need to clean the cushion several times to remove really tough or old stains and odors. Treat any remaining odor by sprinkling baking soda liberally over the foam and letting it sit overnight in a well-ventilated area. For any of the mixtures, you can add some drops of lavender essential oil or lemon juice to freshen up the scent. Vacuum them as often as once a week, spot clean at least once a month, and clean them more deeply once every 2 months. Move forward with spraying down the entire surface area of the foam, ensuring that no affected area is missed. Take your time.