Product review (2 stars): Clean Tank with Bleach
This filter is not that great. I've owned the humidifier for about 6 years, and I believe it works well. I bought the filters with the blue lining and they would last 2-3 months with regular maintenance and cleaning. I've had this new filter they are making now for about a month and it's yellow and hard already. Obviously, it's a consumable product and they created a cheaper product that people would have to replace more often- more money for them! If you are getting mold on the filter, then perhaps the filter is standing in water for too long while the humidifier is not running (warmer days) or you are not cleaning the tank properly. When I first got the humidifier, I used vinegar and water to clean the tank and tray and noticed that I was starting to see mold. Then I switched to cleaning it every 7-10 days with bleach. I put about 1/8 c. of pure bleach in the tank and shake it really hard with the lid on, then fill with about a cup of water and shake again, then rinse really well with cold water a few times to get rid of the bleach smell. I've never had mold form on the filter or in the tank. I also use the protech inserts in the water and I think it probably helps. However there is no substitute for cleaning with bleach.