Product review (1 stars): Trash it!
If I could rate it lower I would based on taste of the water.  I left the filter in for over a month and using it seeing if flushing it more would help, with no change. The Pur filter was far superior regarding taste.  Amazon, delivery was as always super, why whirlpool went with such an inferior filter from a consumers view I can only quess.  The throwing the two pac filters in the trash and buying a Pur.