Product review (5 stars): Great filter
Works just a good as the one that came with the humidifier. I will be sure to take this out of the humidifier once I'm finished using it, let it dry off and keep it in a dry place until ready to be used again. My last filter lasted two years (it's a cool mist that I bought for my newborn which she only used when she got sick about half a dozen times) and then went moldy from being kept inside the damp humidifier while being stored and not used.