Product review (1 stars): This is not a Kaz or Vicks product, but a cheap substitute!
We have very hard water. The other filter wicks I have used had a stiff plastic or metallic screen on the outside to keep the wick in place.when wet. When a crust of minerals reduced the absorption of water I would soak the wick in a mild vinegar solution to dissolve the minerals. This would prolong the ability of the wick to have several months of use. The lack of the mesh caused the wick to flatten from the first wicking of water. This wick was very, very generic!! (Had a manufacturer's name of "Humidifier mfg").First time I used the vinegar solution it totally collapse!. This was supposed to be a reorder from a previous purchase, which it definitely wasn't. ALWAYS BUY A BRAND NAME FILTER WICK THAT HAS A PLASTIC OR METALLIC MESH COVER!