I keep mine just at room temperature out of the sun and have no issues. I asked
Canada E-Cig their suggestion and they said as long as it's kept below 20degrees will be fine as all the bases in their juice is food grade right down to
their nicotine is from potatoes wich honestly blows my mind
Technically, you can extract nicotine from ANY plant in the "nightshade" (Solanacea) family. Tomatoes, potatoes, mandrake, datura, bell and chili peppers, and even petunias all are members of this Family, and produce nicotine...
https://en.wikipedia.org/wiki/Solanaceae
This is why e-cig prohibition is such a ridiculous impossibility. If made illegal, the fact is that it is chemically easier to make nic-liquid than it is to make ANY currently illegal synthetic drug, and the plants that produce nicotine are so ubiquitous and integrated into human life that outright eradication of sources of nicotine is simply impossible without causing widespread cultural, economic, and social chaos.
I mean imagine the backlash if the FDA tried to regulate nicotine with the same insane paranoia that they regulate TCH? Imagine every little old lady having to get a special Federal permit to grow petunias. Imagine if everyone with a backyard garden had to get a Federal permit and submit to rigorous Federal inspections and isolation rules (high fences, security systems etc) to grow potatoes and tomatoes.
Such a move would be so absurdly draconian that it might just be the spark that lights the fuse on the Second American Revolution...