Product review (3 stars): Works but consumable with recurring expense
My Vornado humidifier works well as do these related wicks. The setup is especially beneficial if you to COOL down a particular room such as a bedroom in the winter such as in a high-rise where the occupant has limit control over the heat and humidity.  The problem is the water and wicks grow pathogens when left idle.  One approach is to keep it going 24/7.  Using a TINY amount of bleach also helps.  Too much bleach cause these to disintegrate.  When needing to semi-permanently dry them out, I have had good luck placing them in an oven with the lowest possible temperature setting - 175 degrees.  This will preserve them for future use.