For best circulation, place your reed diffuser where people pass by throughout the day. For a strong scent and a fuller fragrance, use all the reeds provided and turn the reeds daily. For a more subtle scent and a lighter fragrance, use fewer reeds and turn the reeds less often. Do not place your diffuser directly on polished or painted surfaces. Use a coaster or mat to avoid damage to furnishings, and wipe up any spillages immediately to prevent stains. Our reed diffusers will last until all of the fragrance oil evaporates (typically around 10-12 weeks depending on the temperature of the room and placement of the diffuser). Do not light the reeds. Keep your diffuser away from pets and kids because high doses can be harmful to them.