Keeping your E-Liquids stored properly will help keep them fresher for longer, even beyond their expiry date. To get the longest life out of your E-Liquids, be sure to keep them sealed in a cool, dark spot out of direct sunlight.
E-Liquids left open, out in the sun, or in high temperatures run the risk of oxidising. And while oxidised E-Liquids aren’t considered harmful, they’ll probably lose some of their flavour and nicotine strength, too. They may turn a darker brownish colour and may become thicker as well, which might make them harder to vape.