Product review (2 stars): Can wash filters
When I first ordered my humidifier, I priced the filters and they were on Amazon for $6 each. The second I bought the machine the filters suddenly changed to $16 each!! Not cool Amazon. What I did find out though is that you can "wash" the filters. You take them out when there is a hard line of hard water buildup on the top. You can put the filter in a warm water bath with a cup of white vinegar. Leave the filter in the water vinegar bath (completely supmerged) for about an hour and the filter comes out almost like new.