so i just got my first tfv12 and when i got it i disassembled it primed it and put back together i did the same with my geekvape aeoleos now 10 days after both coils are total black coal black before i changed the coil in my aeoleus i had it in there for 3 weeks and it didnt lok as bad i just recently added a licorice liquid into my i whould call it rotation but it isnt that dark what is your experience with this.