1. Don't add too much essential oil. and Only add water-soluble essential oils. Otherwise, the humidifier will be corroded. 2. Add appropriate amount of water, maximum water amount is 4l. Don't make the humidifier lost balance, or the water will spill overMaintenance instructionRegularly clean cotton swabs and Change cotton swabs, you must add the spring wire with the cotton swabs, because there will no mist come out if without the spring wire. please clean the atomizer plate with medical alcohol regularly.NOTE:Service&Feedback KBAYBO focus on the high-quality products, also possess the good quality of service for every customers. If you have any suggestion/problem after you receive the parcel, please kindly contact us before you give us neutral or negative feedback, we will try our best to give you a satisfactory solution. if you are satisfied with the products, please kindly give us 5 stars in the feedback. Our progress because of all of you!