The sprays and mists only cover up the smoke and smoke residue. If a person has more than just an aversion to tobacco smoke, such as allergy or physical sensitivity, the sprays can actually make a persons problem worse. The smoke is not neutralized, it is merely covered up. Also, the spray contains aerosols that numbs the receptors in the nose causing a temporary block to odor. Same fact applies to candles. The answer for these folks with a true problem is a non-smoking environment .