Use a rolled piece of paper or plastic funnel if needed. Stop including when you’ve obtained about 1 inch of area on the top of the powder. Apply to your carpet, wait no less than 5 minutes, and vacuum. Learn tips on how to make three homemade carpet deodorizers that naturally freshen your flooring and remove odors so your complete house smells clean. While baking soda makes a superb deodorizer—just sprinkle on upholstery, let sit for at least 20 minutes, and vacuum—it will only break up mild stains on material.