Why Does Vape Juice Turn Brown in the Tank selbyvapes Eliquid Facts Why Is Something Wrong With Ejuice & Bottle Why does e liquid turn brown? And How To Stop It. EDGE Vaping Is this a problem with my pod? My juice keeps going dark really quickly and it tastes horrible. I know it can go brown through oxidation but I've read that shouldn't affect does anyone know why this happened? my vape juice turned this weird rust colour a few hours after i filled this caliburn pod today, i have been vaping on it for about