So I'm kind of new to vaping, I have been doing it for a couple weeks. I was looking into dripping and was wondering if the isub tank is something you can drip with because it has a non removable drip tip I am assuming you can drip with it since it says "drip tip" but i have no idea. If I can drip with this tank, how do I do it? Do I just drip a couple drops of liquid down the tube? Also can I still have the tank filled with liquid while I do this or should I have an empty tank for this?