I don't have that tank. But you mentioned you have/had the flu. That could be the source of your burning/blister lip problem.
Also, people report all kinds of medical annoyances when quitting cigarettes.
Could even be your juice. Anything.
Hope others who have that tank can help, but I doubt it has anything to do with the tank.
It more then likely is this terrible cold I still have, Hell to be honest I cant really taste anything right now. But yeah my lips to feel kind of burnt red and sore, I don't think it is the e liquid because I have been vaping it for well over a week and it was find when I was using the Cerberus Tank too. More then likely it is because of my allergies and this head cold from hell now. At least my fever is gone think god.
...