Directions for use: Fill top dish with water and add a few drops of your favorite essential oil, or use a scented wax melt intended for this purpose. Light a tea light candle and slide in through the opening at the back. Once water is heated, oil will begin to diffuse. Water will evaporate before the tea light burns out, so be sure to refill water as it gets low, adding a few more drops of essential oil if desired. Use caution, it will get hot! If top dish becomes sticky or dirty from oils, wait until completely cool and then use rubbing alcohol to remove residue. Never burn candle under a top dish that is dry. Never fill top dish with oil or other flammable material. Use caution with open flame and hot water or wax - burn and fire hazard. Do not let children play with this product. Never leave unattended.