Been using this tank for the last month and love it. However, it is due for a coil change & I cannot, for the life of me, figure the damn thing out to replace the coil. Can anyone give me detailed instructions on how to do this - on layman's terms as I have only been vaping for a couple of years with a MVP 20 and clearomizer. This new tank has me confused about removing & re-installing its coil. Any help would be greatly appreciated. Thank you......