Im sure others will be along with better info but for me its a wicking issue. Right now its not leaking and its probably because i rewicked it about 10 times before that. How bad is it leaking? I have gotten into the habit of taking a puff after ive let go of the fire button and that helps as well if its just moist.
The trick for me seems to be making sure my thickness is just right and not pressing the cotton into the
juice well too much. I pull my cotton up
through the tba then cut it then push it down gently. It helps me get the length right.
Tapayappin