I have noticed in the premo cartos that the filling is packed in there VERY tightly. I use a syringe to refill and it sometimes takes quite an effort to get a regular (not dulled) syringe into the filling.
I see some folks mentioning that they fluff up the filling--how do you do this without damaging the wiring, especally when the filling is wrapped so darned tightly around the center post?
I use an air compressor, others use hairdryers, others "fluff" with a sharp object such as the syringe needle during filling (which is what I used to do). Regarding not drying them out before refilling, fine, each to his own. Keep in mind that the
juice is a glycerin base which does not readily oxidize the metal parts in the cart (primarily the heating coil); water will, especially when you take wet carts, refill with juice, then cap and let sit for extended periods of time before using. The juice is all gycerin based; I do not believe it is thinned with water or water soluble - nicotine solution is added to the PG, VG, or PG/VG base. I do not recommend leaving any water in the cart for any reason for any extended period of time unless you intend to toss the carts after a few refills. Dry batting will absorb more juice, carts filled with juice have a very long shelf life.
With the way things are looking from a legal and political perspective, I intend to save as many carts as possible, keep them in good condition for as long as possible, so when they are no longer available, I should be able to get by for a few years (at least two as long as the juice lasts 2 years in the fridge). After that, there better be a way to get juice so I don't have to become a chemist; but at least I will have several hundred operational carts and numerous batteries and plans for mods before the day of reckoning arrives. Call me chicken little if you want, but all you proponents of vape once or twice and discard, don't come knockin at my door for carts next year. It won't be because ecigs are banned (which is still down the road a while), it will because the FDA / ATF / USPS will have the self-annointed authority to seize all shipments containing any and all of the products we currently purchase from V4L without any legal precedent or recourse; we will not have to wait for legislation to happen, this is already underway.