I have been vaping awhile and have used a dual tank before and only had to change the cartomizer in it and rinse the tank out to use a different juice in it, well I now have the protank 2 and not sure what to do. I have watched youtube and looked on here and it shows how to replace the coil head of it which I know how to do that then it shows something about the coils. Do I need to change the wicks so I don't have the old flavor? Also they show something or other about the build up of juice in the cap?? or something..What do I need to buy besides the heads so I don't have to rebuild everything. I want something easy..I don't want to build anything as I just don't understand it. Any help would be nice