I bought this filter a couple weeks ago.  I did as recommended when I installed it, namely ran a couple gallons of water through it before I drank the water.  The first glass was clear but the next one, about half an hour later was cloudy and remained cloudy even after I let it sit on the table for quite some time.  I replaced the new filter with the old filter (2 years old) and the water ran clear and stayed clear.  Is there something wrong with the filter or ????