The e cigarette cartomizer is the most difficult to refill, These electronic cigarette cartomizers were built to be disposable one time use only, but they can be refilled so that it saves you money. However, to start you are going to need your empty vapor cigarette cartomizer, a paper clip with one end bent out and E liquid.
Just simply grab your electronic cigarette cartomizer off of your electronic cigarette battery & you'll notice a white plug on the mouth side of your electronic cig cartomizer, take your paper clip and stick it into the hole if the white plug, then pry it out. Then inside there's a rubber stopper to prevent the liquid from getting in your mouth. Grab your paper clip again & pull the rubber stopper out.
Now you have your real stuffing inside of your electronic cigarette cartridge. All you need to do is get your E liquid and drip it into your e cigarette cartridge, keeping it near the edge trying not to get it on the center hole of your vapor cigarette cartomizer. Just drip some drops, you will know your electronic cig cartomizer is full when you see some liquid pooling at the top. If the pooling from the E liquid gets to high you can just use a tissue to soak it up. This same method can also be used if you drip your electronic cig liquid into the hole. You can stick a paper towel behind and blow gently. Then that extra E liquid will get soaked up.
When you're full, get your rubber stopper out, put it back down in your vapor cigarette cartomizer then shove it all the way down with your paper clip. It should automatically lock into place right after the stuffing. Afterwards grab your white plug & push down and you can hear it snap into it's place. Now your already & all you have to do is put the vapor cigarette battery back on then your all ready to start vaping!