Thanks, Uba. I am really thinking it is the filler. I think it just does not absorb enough juice to keep vaping with a battery of this size. I believe it is a design flaw. I only hope that the next batch of cartos has been changed. I will probably contact Drew, but if no one else has contacted him, he will think the problem lies with me. But I have tried everything I know, and nothing works. Appreciate it if you let me know if you discover the problem when you dissect it.