Does anybody have PG or VG with nic in it? Where do you store it? I've got some 36mg PG squeezed in a tiny little refigerator and I've had there it for more than a year. I don't think it's lost it's potency although I dilute it down by half when I use it. I don't think I'd leave it out of the fridge.
That's what people are talking about when they talk about nic. It's sold in PG, VG, or a combination of the two. You can't buy pure nic. I buy mine in PG.
The most important thing is to store it in a cool, dark place. But, ideally in glass bottles in the freezer.
I've never put mine in the freezer YET. I intend to as soon as I have a second freezer (as soon as we move into a house). In the meantime, I put mine in the back of a top bathroom cabinet, away from the grandkids. Heat rises, so a bottom cabinet should be better (if no kids around to get into it).
But, the freezer is ideal. (Again, if there are no kids to get into it.)