Product review (5 stars): This really works and helps keep humidifiers free of 'stuff'
Since I've been using this stuff, I've rarely cleaned my humidifiers. It's really too good to be true but it really works. For the evaporative humidifier, I normally clean it about weekly which includes cleaning the calcified stuff around the heating element. The other day, almost nothing seemed to form around the heating element. I also have the ultrasonic one and going almost three weeks now without cleaning albeit the label instructions opposing use in ultrasonic humidifiers.