The purpose of diffusing concentrated plant essential oils into the air is 2-fold. It adds a beautiful natural scent to the room and it cleans the air of pathogens. Diffusing is one of the most effective ways to enjoy the benefits of essential oils. Breathing deeply relaxes the body and allows the essential oil molecules to be utilized very effectively. To keep your diffuser working efficiently here are a few tips: use a cup to pour warm tap water into water reservoir, fill water just below the marked water line, and clean the white ultrasonic disc with rubbing alcohol and cotton swab on a weekly basis. Just Breathe!