Frick, the problem was with the origional pre-filled carto. I thought it was just a bad flavor so washed it out and refilled it with my own
juice. It still had a nasty taste so I tried using another. The second carto, I vaped on straight out of the packet and it tasted fine the first 4 - 5 puffs, then tasted nasty like the first. The
juice I use is approximately 70/30 PG/VG, but it tasted weird or burnt straight out of the box without refilling with my own
juice.
Hmm. I've opened 12 cartos out of 25, sampling every box I have, and have yet to have a single pre-filled carto taste like anything but the juice that's in it. Only on refilling with 50/50 juice do I get the burnt taste. I ordered a bunch of 70/30 from two different vendors, and have tested all of it. Every single carto works great with the 70/30.
I've read the other threads in the Bloog sub-forum about burning cartos.
This leads me to believe it has nothing to do with the ratio of VG in the juices used, but simply faulty cartomizers. Perhaps just a bad batch, maybe the manufacturer changed something Leaford isn't aware of. I read in one of the
posts about someone discovering a melted silicon ring in the cartomizer upon disassembly.
I can say that the 'burnt taste' most definitely
can be reproduced with nothing more than 50/50 juice. As I said, all of my pre-filled cartos tasted fine.
I can take an empty, cleaned carto, fill it with 70/30 and vape successfully with no burnt taste, concluding that it's a good carto.
I can clean it again, fill it with 50/50, put it on the same battery, and get instant burnt taste.
Clean it again, fill it with 70/30, and it's a 'good' carto again.
It's the ratio of the juice, at least in my case. I figured this out very early on, when I started refilling all my cartos with 50/50. 70/30 is fantastic, and I have one carto that's been refilled 7 times now, still vaping like it was new.
I'm not discounting that you may have received some bad cartos, just that I have yet to have a new carto taste anything but good, and that the burnt taste I'm getting is only with heavy-VG juices.