Thank you for your feedback. We are sorry that it didn't meet your expectations and we will share your suggestion of an auto shut-off with our design team. The fact that the humidifier went through water quickly can be a good sign--this humidifier has a large tank, so it means that the humidifier was putting a lot of moisture into the air quickly. If it didn't feel that way, we would like to learn more so that we can help. Please email us at SocialSupport@kaz.com