Product review (2 stars): the cheaper price on these is great, but they are hit or miss in my ...
Yeah, the cheaper price on these is great, but they are hit or miss in my Holmes humidifier.  The one I put in 2 days ago has yet to get the Filter Check meter to rise out of the red area.  The one before that worked as it's supposed to for several weeks before it needed to be replaced.  Got one left of the 6-pack.  I won't buy these again.