Product review (5 stars): Two months on my first set of filters. Desert ...
Two months on my first set of filters. Desert SW using 3 drops of grapefruit seed extract&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Nutribiotic-Gse-Liquid-Concentrate-2-Fluid-Ounce/dp/B0002JHZO8/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Nutribiotic Gse Liquid Concentrate, 2 Fluid Ounce</a>&nbsp;with every tap water refill. Every two weeks I perform a complete wipe down and  soak these in vinegar for 30 minutes. I was prepared to install my replacement wicks after two months but other than a little discoloration, these wicks are still going to work. No smell, no slime, makes the room a little cooler but that's OK. Be sure and let the fan turn off completely before bumping or removing the tank on your humidifier, that could make your fan out of balance.

UPDATE: My second winter and I decided to just replace monthly instead of trying to clean them. I use 5 drops of the GSE liquid and never have had a smell problem. I normally order a set when I replace them to have the new ones on hand. Unfortunately, This time the price had increased by around 30%. I'm going to try cleaning and reusing my old ones because of the price change. Luckily, winter is almost over so I don't think I'll need them but for another month anyway. Next winter, I may be looking for a new source though.