To keep your Vigilant Humidifier working ideally, it's important to replace the wick every four to six months and also to use a drop or two of bacteriostat when refilling the reservoir.  

We have factory supplied wicks for the various sizes of humidifiers that we use from Vigilant.  As the humidifier does its job, it pulls air through the wick which is providing the critical moisture.  Normal impurities in the air, such as dust, gets trapped in the wick and is not continually recirculated through the ClimaCab.

The bacteriostat is required to keep mold and mildew from forming inside the reservoir and on the surface of the wicks.