We only run the humidifier once in a while (if someone is sick or it's really dry) and we've done well with a cool-mist + cheap distilled water (nearby water st

We only run the humidifier once in a while (if someone is sick or it's really dry) and we've done well with a cool-mist + cheap distilled water (nearby water store). Distilled water simply doesn't go bad, so we buy many gallons at a time and it also serves as a disaster prep item.