I am having issues with my kangertech mini I have the rebuildable coil in and i have cleaned the whole thing and have made sure everything is tight but not to tight. I am having juice lead through where the air flow holes are and I only fill my ejuice to just below the coil. Any ideas how to stop this and not have my juice wasted? I leaks when vaping and when in non use always in a up right position. Doesn't matter what kind of juice is in it either.