Do not use RO/Filter water since it will halt the steam generating process. Always use regular tap water. It is recommended that the container be washed with lukewarm water before use to avoid the plastic smell. This Facial steamer are used for cosmetic purposes. The sauna is available for use for facials, massages, and cleaning. The vaporizer aids in the removal of blockages and the rejuvenation of your skin. It may be used to treat respiratory disorders, aromatherapy, cold nose and throat, bronchitis, laryngitis, hay fever, arthritis, and asthma.