It's un likely to be cracked tubing, the tubing on the smokeimizers is more of a silicone based plastic, it's pretty much shatter proof unlike the old CE2 tubes. No, leaking is more then likely through a number of possible things: you could be overfilling them and allowing
juice to go up and into the central air tube. Don't get fluid in the central tube, ever! If it's coming out the battery then fluid is getting don't the centre somehow, you don't want that. Another way it could be happening is through transist. They really only like to be vertical all times, else they are stupidly easy to have leak everywhere. for me they are at home only use, taking them out and about is a bit of a gamble.
To refill them, take off the end cap and remove the small (and irritatingly fiddlely) plug with the tweezers provided. Syringe in some
juice but try to leave around 2-3ml gap for air flow and to decrease likelihood of leaking into the air tube. Replace fiddle plug and you should be good to go. Hold them vertical as much as you can, down vape them with your device pointed upwards if you can help it. You will get, even with the most care in the world, some small amounts of fluid build up in the central tube, this is likely a mixture of condensation and small amounts of juice. That's unfortunently unpreventable.
All in all, they are not as amazing as TW make out, though the claims of them being non cracking / shattering plastic wise is, at least in my testing: true enough.
