Odor-No-More's Nature's Best Solution Stain and Odor Eliminator treats longtime smells and stains at the molecular level, the manufacturer reports, adding that the lightly fragranced solution uses a patented micronutrient-based formula that neutralizes odors instead of masking them. The product is nontoxic, environmentally friendly and safe for use around pets, the company states. It is designed for all surfaces, including carpet, and is available in 8-oz., 32-oz. and 1-gal. bottles.