Product review (3 stars): DRY FILTER
I had good humidity using this filter in 2014 ,, how ever in December  I checked I to see if it was clean or dirty ,, it was quite clean but for some reason it was completely dry . And it was not delivering any humidity at all .. I replaced it ,and it seems to be putting out the humidy  ... What causes it to dry ? I keep water in it all the time,,,