Product review (5 stars): Phenomenal Product
We bought a humidifier last winter (2011) and after two months the filter started to smell. We ended up buying two filters that year. This year (2012) I read the product reviews and purchased this stuff along with a new filter. It has been three months and our humidifier filters does not smell. Before buying this the filter it had a musty sort of smell even though I would rinse the filter and clean the humidifier weekly. With this product I do not have this smell. Though I will have to buy at least one new filter a season I'm still saving. Would definitely recommend.