Product review (1 stars): Very dis-functional!
Very disappointed in this product. It does not wick up the water to wet the entire material. The top 1/2 half and more of the filter dries out and turns an ugly brown and very unappealing to the eye. We maintain a water softener so mineral accumulation is not a problem.  I tried wetting the entire wick when I refilled the water jugs, but still the same problem.  I replaced the wicks as suggested, I cleaned, & did everything I can think of to keep this humidifier operational.  All have failed.  When you have more than 1/2 of the wick dry, there is no way the humidification process can work efficiently.  It would several days for the unit to use up the 4 gallons of water it is storing.  I have wasted so much time & money on electric and wicks that I am disgusted with this product. Please notice in the picture the water line on the bottom of the wick. From there up is dry as an old bone and non-operation. I think you need to re-engineer these wicks and perhaps the humidifier itself.