A:AnswerDistilled water is best, though tap water can be used. However, it can shorten the life of your wicks and your unit as hard water deposits build up. The harder the water the more issues you may have. Cleaning the unit regularly per the manual is important. If you have further questions, please reach out to our Consumer Care team at 800-234-0604 or email us at [email protected]. We'll be happy to assist you.
