Does anyone know how often one should replace a pod w a vape like this? The liquid has turned a darker color is that normal? Just curious. : r Vaping U.S. health officials move to restrict e cigarette sales to teens PBS News Your Guide to JUUL Pods and How Long They Last The (Financial) Case Against JUUL by Brandon Brissart Medium Juul Suspends Online Sales of Flavored E Cigarettes The New York Times