Product review (1 stars): Awful filter for unsatisfactory humidifier
I used these filters last year and they were perfectly satisfactory.  The ones I got this year smell. The first one had mold spots and turned color.  When I replaced it (sooner than I expected to) the new one emits a terrible smell that fills my apartment.  IN addiiton, I have been waking up with a headache since I starting using the new one.  Yesterday I put the whole thing outside, including the smelly mats I kept under it to absorb the water that spilled. And I did not have a headache this morning. Headache or congestion?  I have to figure out which is worse.
I have not been happy with the Vornado Humidifier, but am reluctant to spend the money on a new one.