Best before date is 21 AL 29. I have stored it in my extra fridge as per usual. The seal is loose and the entire block of cheese is covered with mold. Another package also is loose although not mouldy. I have always bought Cracker Barrel on sale and stored it for considerable lengths of time. I never had any problems with the old 909 g package. I would suggest your packaging is not up to standard on this size of cheese block.