Product review (1 stars): These things always clog.
We had two Air-O-Swiss mist humidifiers during the last several years. I got fed up with the demineralization cartridges always clogging. We had to continually monitor the humidifier to make certain that it was misting. If it wasn't, we had to "jog" the tank to shift the little beads in the cartridge. Although I tried refilling the cartridges on my own at first, this proved such a tedious task, and one that didn't always work, that we had to resort to buying new cartridges every time it was time to replace them. When I tried to set up the humidifier this year, and the brand new cartridge failed to work at all, we replaced the humidifier with a different brand--one that just works without any mess, pain, or fuss. I will never again buy Air-O-Swiss.