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 How To Make the Switch From Disposables to Pod Vapes NZ VAPELAB Juul Gets Temporary Reprieve to Keep Selling Its E Cigarettes The New York Times Packaging change? : r juul Juul's 'switch' campaign for smokers draws new scrutiny