Product review (4 stars): Flush your system
First off, it is a twelve buck filter! It will not filter out sulfur, hard water, certain chemical smells and tastes. Also check your fridge lines, if you ran a filter past its prime for awhile and it stopped working but you kept using it your line to the front of the fridge could be tainted. Install a new filter and run a lot of water through it to flush the hose. I run a new one every three months and at every 6 months flush my system. It is still miles cheaper than bottled and my ice tastes great.