<p>2000ML USB Air Humidifier Double Spray Port Essential Oil Aromatherapy Humificador Cool Mist Maker Fogger Purify for Home Office</p><p>Precautions for using humidifiers:</p><p>Before using the humidifier for the first time, the buyer needs to take out the cotton swab from the humidifier and soak it in water for 2-3 minutes until the swab is completely wet, and then install it back into the humidifier for use. The humidifier will only work when the cotton swab is completely moist.</p><p></p>