I've been having trouble getting over a bout of bronchitis (I've had it since July 27th or so) and I called my doctor last week. She recommended I get a cool mist humidifier to keep in my bedroom. She also recommended I start using Vicks VapoRub for some of my chest congestion until I finish my antibiotics and get in to see her again. While I was shopping I remembered that my sister used to use VapoSteam in her humidifier for my nephew when he was a baby. However, I saw on my cool mist humidifier information that it says not to use VapoSteam with it....does anyone know why I couldn't use VapoSteam with a cool mist humidifier? I'd rather do that if it's ok than use VapoRub. Any suggestions?