Product review (5 stars): Use it correctly
Most people that purchased this don't know how to use them. First use only filtered water (from the refrigerator water filter). Second, buy a 1 ounce silver coin (a US silver Eagle, or equivalent) that you can get at any coin dealer for about $17. Place the coin in the reservoir. (in case you don't know almost all hospitals use silvered water in their operating rooms). Mold, bacteria, mildew and the like cannot form and grow on a tank with a silver coin in it. Third, refill the tank before it gets empty, preferably when it is half empty. Take the filter and wash it out under warm water to remove some of the mineral deposits (the orange discoloring). turn the filter over so it is inserted upside down from the way you took it out. Be careful how you put it back in so not to damage the edges. Doing this it should last 6-8 months.