Ok guys and gals, I posted a while back in this forum and I want to try something again. I love this tank. I have 6 bellus. I have serpents RTA's, I have Goiath 2 tank, I have kangoer protank mini's. I have several different tanks and have never bought premade coils. I just rebuild. I only do single coils, for me the dual coil is not worth the difference. This tank has as good of flavor as any tank I have ever vaped on, that is why I have 6 of them. Here is my delimma, I have watched every you tube video I can find on wicking. IF i fill from the bottom I have no problems, but if I wick it enough to not leak on top fill I get dry hits. I only put the cotton on the top shelf of the juice channel and I have to keep it pretty thin there or it will dry hit. If I do it like this though and try to fill from the top it leaks alot. Here is the part that is interesting, If I do build it with dual coil it is much more forgiving, I don't have nearly the problems. If I put the cotton a little past the frst shelf I can tell the the cotton is being pinched when the tank it together. I have seen people build this deck on you tube and I can never get away with how they build, I can see how it does not leak that way, but I always get dry hits. I usually build from .4 to .6 with single coil around 25 watts. I have tried cotton bacon, and Japanese cotton and it makes no difference. If I build where I get good taste and no dry hits It will leak when I top fill. I have even cut the cotton really short, like bowtie, then wet the wick and let the tank push the cotton in place when I put the build deck in. Like I said I love this tank,but this is the only tank that I can honestly say has beaten me on being able to top fill and not get dry hits. I guess it is a matter of pride. I see so many people saying they never have a problem and it is confusing to me. I am not the top tier in wicking and coild building, but I don't consider myself on the bottom of the heep either. If anyone has had this experience I sure would appreciate any hints. This thing has really stumped me. I will keep on using the bellus as I love the flavor of the vape, but it would be nice if I could top fill without leaking alot of juice. Oh, I have closed the airflow when filling and not closed it, I have also turned the tank upside down to burp it. I have tried everything I can think of.