Any juice is going to gunk up a coil,,with darker juices and additives gunking them up more, its heating that coil properly and keeping the gunk off of it that makes it not get so gunked up, maintaining that Atty and keeping an eye on them. Attys aren't made to last forever. I've been extra fortunate with my 357's lasting very long, maybe longer then normal but then again I'm rotating about 10 of them, five getting used all day long rotating different Mods. Really though at a pack of smokes costing $6-$10 that's 2-3 packs for the cost of 1 357 so if you get a month out of a 357 in my opinion your way way ahead of the game. Everyone isn't going to buy and use them, but for there performance, quality, and in my case longevity as well, there worth every cent,,
Maybe someday they will come down in price, but hand made Attys like this aren't ever going to cost what the ones from China do that are mass produced and whipped together in about 15 seconds. It all boils down to cost, preference, flavor, the overall whole situation in my opinion. It seems everyone complains when there Atty goes too, my guess is most is user error, some may not be as strong as others, getting use to them and how they run over the standard and other Atty's, but all in all the coils, build & QC that goes into the 357 is above and beyond others. These Attys are dam good no matter how you play the hand. I have blown 1 in 8 months now, out of running 11-12 of them,,, Hanna's doing something right here when I lay my odds down on the table for as many as I'm using and how long they not only last but how dam well they vape and taste.
I'm also running a thick heavy VG juice in all of mine, its all I use. 5 @ going on 7 months says something to me, and the 1 that I did blow was my own fault for hitting it to dry to many times ( even though it looked wet it wasn't ). I'd put these up against any other Atty on the market, bar none there the very best of the best and it cost to play and have the Best of anything. If ya blow an Atty ya gotta be able to afford to screw another one of these on, or use them as a treat if not, if not then you should be buying the $5-$8 Atty's, if ya want the best of the best then you can afford to play and twist on another 357, if she blows she blows,,but again when I look at all the ones I'm running I'm miles ahead of the game because the cheaper ones don't last me nearly as long as a 357 does, doesn't vape as well, and doesn't have nearly the flavor the 357 does, so I'm paying for all of those differences and find them to be #1 just my 2c
you get spoiled once you've used these, nothing else is quite the same, Hanna's only getting Better too in my opinion. 
