Product review (2 stars): Was advertised as mold-resistant, but the Honeywell 6009 naturally ...
Was advertised as mold-resistant, but the Honeywell 6009 naturally has it half in water continually.  We reversed the filter every few days and it still started developing mold spots after three weeks.  We kind of expect that with the way the humidifier is designed, but we paid a higher price for the mold resistancy and it didn't provide.  I am going with cheaper filters and will just change them when they start showing mold & mildew.