If water or essential oil enters the diffuser it will quit working. If this happens, your should unplug and clean the unit and remove any water and let it sit for a day or two to “dry out”. Water may evaporate in a matter of hours, but essential oils take more time.Click to see full answer. Similarly, why is my essential oil diffuser not working?If water or essential oil enters the diffuser it will quit working. Water may evaporate in a matter of hours, but essential oils take more time. After it has had time to dry, refill and try it again. The moisture will evaporate and the diffuser should work once again.One may also ask, how do I know if my diffuser is working? It’s easy to see if the Ultrasonic Plate is working or not. Put water into the diffuser. If you see bubbles, you’ve got a solid Ultrasonic Plate doing its thing. If not, the plate may need to be replaced. Accordingly, why can’t I smell my diffuser? If you do not smell fragrance even while standing above your diffuser, check to make sure that the red plug atop the fragrance capsule is removed. If it has not been removed, the capsule is sealed and pressurized. Do not remove the red plug while your fragrance capsule is inserted into the diffuser.How often should I clean my diffuser?Ideally, a diffuser should be rinsed clean after every use, especially if you are changing the oil scents. Then, depending on how frequently the diffuser is used, it should be thoroughly cleaned at least monthly to remove dust and build-up that affects how well it works.