Product review (5 stars): what a difference
we love our humidifier, but it were unable to use it for quite some time due to the musty smell.  I have shopped for new humidifiers when I came across this product and decided to give it a shot-and what a difference!  No more musty smell and we are able to again enjoy our humidifier.  It doesn't take a large amount, so this bottle will last a long time.