such a great device husband needed this for a chest cold and it is been very helpful [SEP] so far so good i cleaned the plastic water holder with soap water before using since it had a strong plastic chemical smell then i rinsed the opening where the water container attaches and then ran it for minutes without breathing the vapors after the minutes it smelled finemy husband had been using a pot of water on the stove to breath steam for his stubborn chest cold and it was too awkward this device makes it super easy for him to do treatments in under minute