I've had Atomic Cynacide fog up one of those Smoktech tanks in the pasts. The fogged tank eventually started to crackle.
I did get my tank today and so far it is working good on an eGo T2 in unregulated mode. Vaping Brownies.
Another vendor had this posted on their ViVi page:
"WARNING: Never use cinnamon based e-liquids with plastic cartomizers. Example: Fireball, Atomic Fireball, etc.
Not for use with 100% VG based E-liquid" But maybe they just slap that warning on everything.