You mean cartos? Cartomizers aka cartos screw on. Cartridges aka carts push onto a separate atomizer.
- prefilled cartos are often not well-filled cartos partly because rebranders that sell auto batteries don't want customers killing their batteries with juice leaks
- when a carto gets low on juice, taste can get weak and then when too low, the stuffing will singe and add bitter singed taste. We use models with soft-cap cartos, pop the endcap (or many use a plastic or delrin drip tip instead of the end cap and pull that off), and keep it damp by dripping in drops from a bottle of eliquid (with carto off battery and well cleaned-up before putting carto back on battery). Your brand sells liquid and blank cartos. Learn to keep them damp without killing your battery with leaks. Buy a spare battery first.
- rebranders lie about about many drags or cigarettes-worth a carto lasts. They like to claim a carto lasts 1-1.5 packs but they do not. A well-filled 1ml carto lasts about 10-12 cigs of drags and may need juice sooner to prevent singeing.
Because it's in my paste buffer - how I fill blank 1ml cartos (your should be 1ml), cleanup, settle (on first fill), keep damp
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How I fill V4L/Volt/Bloog KR8 cartos and Boge 510 cartos
With the carto off the battery... Pop out the soft cap with an unbent paperclip in the mouth hole, very careful not to catch stuffing or the wire loop.
Shake and open the eliquid
Fill
Hold a bit of tissue on the threaded end hole (or use the carto condom spike to block the hole),tilt the carto, and add 18 drops per ml of capacity into the stuffing (Boges and most KR8 cartos are about 1ml). You may need to wait a bit for the first few to soak in, then continue. After getting the 18 in, wait 15 seconds or so then see how many more drops the carto stuffing will soak in easily.
Cleanup
Clean up the threaded end, tilt open end down into tissue, puff into threaded end to clear air channel (Boges and the KR8 cartos I use have a defined center air channel and I want to see light through that) While the carto is still open end down, touch a soft bunch of tissue to the top of the stuffing to get the loose juice - this will help prevent leaks. Or to be more thorough at trying to prevent leaks, I'll touch the bit of soft tissue to the stuffing then tilt carto down and puff in the threaded end then remove tissue.
Settle (first fill only)
Cap and let it settle - I lay it on different sides and on the ends for 15-20 minutes to make sure every bit of stuffing gets damp so I won't singe the carto. if you use thicker juice than me (I use 20% Vg or less) then you may need to wait much longer.
While vaping - any time the vapor seems light, dry, or tastes the tiniest bit off or loses flavor, or if the carto is getting abnormally warm, I add liquid. I add liquid before I leave the house, when I get home, before bed, before putting a hot freshly charged battery on it. I also occasionally look at the stuffing (especially if I've been vaping it a while) and if the top of the stuffing looks white, I add some juice.
I use a simple plastic or delrin drip tip in place of the end cap so it is easy for me to remove that to look at the stuffing or add juice. I use thin clear juices that flow easily through the stuffing to keep the coil area damp and leave the stuffing white.
