Product review (1 stars): Didn't last long - white dust in just a couple of days.
I use humidifiers in a vacation home in the Rockies. Being from the east coast the drier air out west has a noticeable affect on us. We have 4 of the large Air-o-Swiss table top units going while we sleep. We closely follow the manufactured suggested maintenance and cleaning regimen. The original cartridges lasted for a little over a month of use at the rate specified earlier. These OEM replacements lasted 3 days before we saw white dust. A high price to pay to only last a few days. I do not recommend but have no idea of an alternative. Trapped.