Warranty How long is the warranty period? I have problems of Manvap products, how can I return it? Where to buy Manvap products? Where can I buy Manvap products (E-cigarette, E-liquid, Accessories)? How to use? Why is there burnt taste when vaping? How to avoid the leakage issue when vaping? Fail to charge the e cigarette? When do I need to replace the coil? How to fill e liquid? Why is there slight buzzing/humming noise during use? Why does the battery heat up? Why did the e-cigarette stop working? User Manual Download the user manual of Manvap products Promotion & Deals Where can I find the latest promotions of Manvap? Others How can I get the customer service from Manvap?