I have primed my carto, inserted it into my IBtanked, and filled the tank with liquid. It is vaping great and great flavor, no leaking at all but each time I take a drag I hear like a hissing type noise. Does anyone know why it's making this noise and is there a fix? If not that's fine. I can definitely live with it. I'm just trying to make sure I haven't done something incorrectly.