Well, my story is a bit different,,,, maybe the coil may get some gunk on it but this doesn't stop my 357 Atty's from working just fine and I'm still getting great flavor too. I have about 10 Mods set up each with a 357 on them 2 Reo Grands, 1 Reo Mini, 1- Reo Woodvile, 1- VV Reo Woodvile, 2 Darwins, 2 Provaris, and my new VVPV, 5 of these Mods are now running 5 Months with a 357 on them, all taste super and are still working exceptional. So even if there is a little gunk on the coil of the Atty after I have cleaned it the heat from the coil also has to help burn some off too, now I'm not saying any gunk cant be left because I'm positive there is but all 5 of these 357's are still running super and putting out a great vape. NO Atty will taste like it did as the initial break in I think after 5 days, but all in all I think these 357's are the best of the best on the market and those 5 that are still going for 5 months now still taste great and provide me a super vape. By the way I use Boba's, the Raf, and some other dark juices and I use all VG too, in my honest opinion keeping them wet always is what makes them last.
Uke - the re-build-ables are a different animal as well, they use a much bigger piece of wick and a much looser wrap of wire when compared to the 357 and its why they gunk up so fast in my opinion, plus they dont perform nearly as good as a 357 either, I ran them all and cant achieve the same quality vape as the 357
These 357's have been worth every cent to me, hell what other Atty performs anywhere even close to these ? = None of them ! Cisco spec coils are fa-nominal !!!