Hi I just switch from dual coil carto single hole punched to a vivi nova ... the only problem I keep having is that the tank keeps filling up with smoke when I vape .. other than that the flavor is still good...no burnt taste or anything.. but every time I see the tank fill with smoke ...it bugs the heck out of me... does anyone know what's going on with my vivi? I'm also new to it but it just starting doing this after I've purchased it for about a week now