Product review (1 stars): Works great but doesn't last long - something to try to make it last a bit longer
***Update: It fell apart after 2 weeks' use.  I am reducing this from 4 stars to 1, the life span of this filter is not good. After reading favorable reviews, I tried the BestAir HW14 to see how it would compare.  The HW14 is FAR better than this one!  I've had it for 2 weeks and it has not nearly been as problematic as the Honeywell wick.  I will stick with BestAir from now on.

****Original review:
These pads work great but doesn't really last long.  Two weeks at most for me before it really loses its effectiveness. It builds up a lot of impurities, which is surprising since I use softened water.  One thing I tried recently was to soak it in some CLR - 1 part CLR to 8 parts water - in my kitchen sink for a few minutes, then rinse thoroughly.  It made the pad good as new, but weakened the plastic adhesive a bit.  But it worked nonetheless.  I will try this again, to see if I can get even more life out of it (i.e. as long as the plastic adhesive holds up)