What is annoying me right now is how the taste of the ejuice is getting ruined by like the 2 subtle tastes of the 2 previous ejuices in the tank, the whole thing smells like rootbeer and tobacco now and when I vape the carmel it has a great taste but its ruined by the 2 previous flavors that was in it, how do I completely rid of the previous smell like the nautilus is brand new