I was gonna say the same as rule about the condensation, but he beat me to it. I keep my working bottle in a cupboard. Once it comes outta the freezer, it stays out. Just to add to what he said......I'm glad to see you said you got your nic in pg. According to Kurt Kistler, our resident chemist..... nic mixes better with pg than it does vg. So with vg it's easier to get nic hot spots if it's not mixed well. It may not be a thing, but I just feel like when it goes into a thicker state in the freezer, it's easier for those hot spots to occur, particularly for those who
buy their nic in vg.
My SOP is: Liters in glass in the freezer. Break down one liter at a time into smaller working bottles. Pull out one working bottle at a time to use.