The following video shows you step by step how to rebuild a Kanger ProTank head, but the same method will work for other BCC (bottom coil changeable) clearomizers as well. This information will definitely help in cases where your ProTank's draw begins to tighten up, the coil burns out, or for when you're experiencing gurgling and/or leaking. Enjoy. PS - This isn't the best tutorial I've seen about how to do this, but I plan to make my own video that will include some improved (hope