Product review (3 stars): Humidifier filter
We need a humidifier for dry air.  The product needs replacement filters.  I would rather not have to get filters, but so be it.  the filters need to be changed monthly if the product is used a lot.  (It is used overnight for sleeping). The purchase of the filters on Amazon was convenient since Walmart ( who sold the unit does not carry the filters. The product is not expensive so the filters cost almost as much as the unit so I guess next time we will just buy a new one.  And buy one set of filters and then a new one again.