Product review (4 stars): Eliminates Humidifier Odors
This stuff works great, eliminating unpleasant odors emanating from my Lasko recirculating evaporative humidifier.

The reason I have deducted one star is that you can get essentially the same product, made by Essick, from Home Depot for half the price that Amazon is charging for this BestAir stuff.

But whatever you pay, if you use an evaporative humidifier, you need a bacteriostatic solution like this, no ifs, ands, or buts...