Using the Stadler Form Mia Aroma Diffuser is easy. First, fill the water tank with clean water. Then add a few drops of your favorite pure essential oil. Place the diffuser on a flat surface in a room up to 350 square feet. Plug it in and turn it on. It will run continuously for up to 10 hours before you need to refill. Remember to use only pure essential oils for the best results. When the water is empty, the diffuser will automatically shut off. To keep it in good condition, clean the water tank regularly with mild soap and water. Don't use abrasive cleaners as they might damage the plastic parts. If you want to return the diffuser, you can do so within 30 days.