Product review (4 stars): It hepled
I like that it helped my humidifer work better however i feel that it showed it age quickly.  Within a few days the filter was turning yellow and after a month the edges are showing wear.  I have been taking it out, rinsing it clean, and letting it dry before i use it. Maybe its turning yellow cuz of my water and maybe its breaking down from cleaning and removing it from the humidifer. I think it will last through this winter and that is all I want.