Product review (5 stars): Work perfectly
I have had my humidifier in storage for a couple of years, because I didn't know where to get the three replacement filters I needed.  Thanks to Amazon I was able to find the replacement filters quickly and get them installed and the humidifier running.  I have been using them several weeks now and they are still in great shape.  The top one inch of these filters do tend to dry a little bit, but the original ones did that as well.  It doesn't affect the humidifier performance, it's just a matter of gravity.  The water won't wick up that high from the bottom of the device.  My humidifier is working perfectly.  Incidentally, I saved the three blue plastic clips from the old filters, but didn't need to.  These filters came with the blue plastic clips that hold them in place.