Rug Doctor, 52 oz. MAX Advanced Multipurpose Deep Carpet Cleaner is our best, most powerful formula. It cleans the toughest, embedded stains and eliminates the worst odors like smoke and pet urine. It's tested and approved by the Carpet and Rug Institute to effectively remove stains and odors without adversely affecting the appearance or performance of your carpet. Ideal to rejuvenate and bring new life to a heavily soiled carpet.