Carpet Stain Precleaners by KRUD KUTTER. Details: Special surfactants penetrate deep into the carpet fibers to break up and eliminate dirt, grease, odors and stains. Leaves no sticky residue, so your carpet stays clean, fresh and soft. Its safe for all carpet types, including nylon and other synthetic carpets, as well as stain resistant carpets. Special polymers repel dirt and stains so next time its easier to clean. Special surfactants penetrate deep into the carpet fibers to break up and eliminate dirt, grease, odors and stains. Leaves no sticky residue, so your carpet stays clean, fresh and soft. Its safe for all carpet types, including nylon, and other synthetic carpets, as well as stain resistant carpets. Special polymers repel dirt and stains so next time its easier to clean.