Cartomizers are refillable, we recommend they be refilled around 10 times as they descrease in performance after 10 refills. The best method to refill is to remove the rubber end piece (small white rubber insert with hole) and drip liquid against the cartomizer wall so it runs down to the cotten filler. You want to drip on the wall to keep the liquid from going into the center hole and running out the thread end of the cartomizer. You should drip 2 drops, turn the cartomizer 1/4 turn then drip 2 more drops. Repeat this waiting a few seconds after each turn until you have put 15 - 20 drops in the cartomizer. Replace the rubber cap and wipe off any excess liquid off the cartomizer and it's ready to use.

 

Note: If you notice a burnt taste that means the cartomizer has been used with a dry filler and the atomizer has burnt the filler. To prevent this from happening be sure to refill with liquid as soon as you notice the vapor production decreasing. If you notice a burnt taste it is time to dispose of the cartomizer and repalce with a new one.