240ML Aromatherapy Diffuser Suitable For Home, Baby Room, Office, Car, Yoga, Spa... Kindly Notice: Due to adoption of the ultrasonic atomization technology, it is recommended to use the essential oil of water soluble so that it can prevent the Atomizing sheet from blocking.When you use it for the first time or if you have not used the humidifier for a long time, it is need to remove the cotton swab from the humidifier, putting it into the water for 2 to 3 minutes before using it which is able to achieve a great effect on operating. (Please notice the spring on the bottom of the cotton tube while you re installing the cotton swab.)If there less than half of the water in the water tank, it is recommended to wait for 20 minutes before restarting the diffuser which is avoid the situation of the zero mist.In case the mist causes the ground to be wet, so it is better to place the humidifier at a height of 0.5 to 1 meter from the ground. Please keep the essential oil diffuser away from sources of heat and corrosion while it is working. Please keep the essential oil diffuser away from sources of heat and corrosion while it is working.Please dont use fingers or stick to poke the atomizing sheet to avoid accidental damage.