just found out most of my frozen stash smells sour and tastes gross so i presume it's gone off. thought i might have has a lipase problem but after reading a couple of other posts it seems like it could be to do with how soon i freeze after pumping. i usually leave inthe fridge for a day or so before freezing in case i need it, then replace it with a new lot and freeze the old. would it stay fresher longer if i immedately froze it. at the moment my frozen stuff is only lasting 3 wks max. thanks in advance.