Product review (5 stars): Wick is lasting twice as long...
I used to think this stuff was a gimmick. I have a humidifier with a Holmes wick. It gets discolored and moldy, fast. It could be that I live in the country on well water. Ive noticed the wick does not seem to last long. Once I started using this, which has been four weeks now, the wick looks almost new. I would guess within another month and I will have to change the wick.

This stuff really works! I feel a lot better too in the morning. I always have a humidifier running so this is something I am going to have to buy regularly