All right, I'm officially done with these Vornado evaporative style humidifiers, our water is so hard the wicks get half dried out wicked fast and then algae or something grows on the margin between the wet and dry parts of the wick.
In like 3-5 days from a rinse/dry/new-wick reset, tops.
Strongly considering trying a "wet mist humidifier" / vaporizer type instead, in hopes the boiling of the water and lack of a wick will lead to longer period before stinky.