after a few attempts, (im new to rebuildables), ive got a 1.1ohm coil vaping nicely in my kayfun clone, very happy with the vapour and flavour coming from it. however, im having to store the darn thing upright, as juice leaks out of it if its on its side, and pours out of the driptip if i turn it upside down. doesn't seem to matter if i fill it from the top or bottom. where am i going wrong?