I've done all the things you mentioned with the first 3 coils. I finally got one to work but I also forgot to mention that I also have the tesla one ,the one that the tank actually came with, and it did the same thing so I really just dnt understand why all of a sudden it's doin this because I've been using this tank for about 5-6 months and it just recently started doin this. Is there something else it could be? Let me know what you think. Thanks