Product review (1 stars): THIS IS SO BAD IT VERGES ON CONSUMER FRAUD
Agree with Kaitlyn Collins and others that the filters are the Achilles Heel for this otherwise-OK product... they don't last very long, treating the used ones and trying to re-use them has already been ruled out by Holmes Corp shrewd engineers, and worst of all --- when you buy new ones THEY DO NOT FIT.
The product # is HWF80-U, and that is the only filter that will "work" with the Wemo HCM 3888c humidifier, but these filters are simply TOO THICK  to fit into the receptacle.
The exact dimensions of the receptacle are 1/2" x 8.5" x 18.5".....
But the replacement filters are  7/8" x 9" x 17.75" !!!  My goodness, Mr. Holmes, I retired as a rocket scientist from McDonnell Douglas but I could have designed a filter that would work with just two years of High School!
Please do not reward Mr. Holmes' bad behavior by ordering more of these units -- the Wee Mo is a kamikaze product and will self-destruct!