Product review (2 stars): probably because there's no metal in the filter like the original
They fall over, probably because there's no metal in the filter like the original. My humidifier doesn't use nearly as much water as it used to which means the water is not misting into the air. I wake up dry. They get filled with gunk much much sooner than the originals. Waste of money since you have to change them a lot sooner. The originals last almost the whole summer season. This not even close. Would not buy again. You save a few dollars up front, but spend more in the long run to change it more often.