If your Vicks Cool Mist Humidifier is not working properly, it’s time to take it in for a cleaning. Here’s how to do it:

  1. Unplug the humidifier and remove the filter.
  2. Pour a pot of hot water into the humidifier and turn it on to full power.
  3. Add a cup of white vinegar to the pot of hot water and stir well.
  4. Carefully pour the hot water and vinegar mixture into the humidifier, making sure to avoid getting any liquid onto the filter or onto the floor around the humidifier.
  5. Replace the filter and turn off the humidifier, then wait 10 minutes for it to cool down before using it again. ..