Why does e liquid turn brown? And How To Stop It. EDGE Vaping juice turning brown.help! Vaping Forum Planet of the Vapes Why Does Vape Juice Turn Brown? I've noticed something with these posts involving dark or defective pods.. the flavor is typically Gold or Tobacco flavoring. I buy the 2.4% Menthol n only had a handful of issues. The On right, pod I've been using for a few days, on left, new pod. Is Vape juice turning brown black normal? Should I be concerned?? : r Vaping