what are the characteristics that indicate it is "going bad" I bought a bottle of 500ml 48 mg plan to cut it to 24 so 1 liter of juice but i know i won't be able to resist shopping for some pre-mixed so this could last me well over a year--i've noticed my rate dropping from my initial 3-5 ml consumption already. Any tips on freezing--concerns? .Will frequent dfrosting give it a sort of freezer burn--maybe freeze a bunch of smaller bottles and take one bottle out each month?