Stanley Steemer Odor Out Plus neutralizes offensive odors on contact, and then uses natural bacterial enzymes to eliminate the source ,i.e. vomit, feces, urine, milk, blood, etc. It also uses a pairing agent to give immediate relief from any odors while the enzyme is working. The key to complete removal of an odor is that this product must reach all contaminated surfaces. In the event that the odor source has penetrated the carpet backing, padding, or sub-flooring, additional treatment such as replacement of padding and sealing of sub-flooring may be necessary. Dilution: 1 part Odor Out to 7 parts water for spot treatment. (1 part Odor Out Plus to 14 parts water for broadcast application). Pre-spray: Can be used as a pre-spray to neutralize malodors. Application: Spray one diluted gallon per 200 square feet.