we have had our fridge for about 8 months.  bought this replacement filter in dec. now in january we notice that the water coming out of the filter is leaving a white residue behind. our tap water is not doing this. only from this filter. spent 40 minutes trying to get support and just kept getting passed around to extensions.  guess i have to pay for a new genuine filter and hope i get a good one. can't get support on this one from the company. its past 15 days for a return so stuck. i'll be sure to test the new one and return at any sign of residue. 
buyer beware.