This advice from Ecigvape.com "Appropriate care must be taken to safeguard against fire-hazards. Many ingredients in e-liquid are highly flammable, as are many substances used in the extraction of nicotine", they are talking about people mixing their own liquids. Shop bought eliquid is not flammable is it? I mean that would not make any sense because we are heating it up enough to vapourise it, so it couldn't be?