Product review (5 stars): Perfect form, fit, function
Perfect form, fit, function. So easy to change the filter this way that it's not worth my time or the reduced effectiveness to clean them. Healthier and easier just to replace once or twice a season this way.  Years ago I used o clean the filter in CLR or diluted phosphoric acid typical led used for cleaning concrete. These filters get nasty, so avoid the respiratory hassle and replace every few months. This fit perfectly and renewed our air with clean humidity. Thanks!