How Juul Hooked a Generation on Nicotine The New York Times 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 Juul Labs agrees $462m deal to settle claims Vaping is not replacing smoking. It is often added to it. This is called dual use. Nearly half of e cigarette users still smoke cigarettes. What this means: Smoking continues alongside vaping