Ok, here's a general question:
my parents buy Mayfield milk (in the yellow jug). The last 4 gallons they've bought, a day or so after opening it, if you sniff it, it smells sour. I mean, yuck! The date on the jug is well within freshness.
But the thing is--its not the milk that is sour. Its the plastic jug! If you clean off the rim it helps reduce
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