I got prefilled ones from Halo but the website says the carts are $8 each. How long until I can no longer keep refilling that one cartomizer?
If you don't burn them at all by running them too dry, then you might be able to fill them 5 or 6 times. If you burn them you may never get rid of the nasty taste. It can really spoil your vaping experience.
After you've put about 5 or 6 ml through the cartomiser you will find the draw gets harder and the vapor production drops off. This is a good indication that the coil has hard deposits on it from the juice. It actually depends on the juice - you get less deposits from a light juice, and more deposits from a dark heavy juice. If you bought a dark caramel capuccino flavour for example, your carto might be pooched after only one ml.
Boiling the cartomisers can remove the old flavour, but it will not remove the deposit from the coil, and because of the filler material you need to leave it a day or two in a warm place to dry out.
Clearomisers are much better in this regard. You can wash them out and the coil heads dry quicker, and many of them have replaceable heads that you can buy relatively cheaply. These heads can also be 'dry burned' which will remove most of the deposit on them and return them to new performance. It's not unusual to get a month or more out of a good coil head that gets occasional use on rotation.
You should never dry burn a cartomisers as it will burn the filler material and taste pretty bad in the long run.
You should google all of this information. There's a ton of stuff out there. I don't know what system your battery runs, but have a look at CE5 clearomisers and expecially the Vivi Nova.
Of course you can stick with the cartomisers if you wish, but as a previously heavy smoker, I found the cost and the constant fiddling a pain. By week two I had bought two CE5 clearos and a couple of replacement heads for them and they vastly improved my quality of life.
