Well as a follow up, I went to the local smoke store that could not diagnose that the crack was due to the type of flavor Vap liquid. I think it is owned by a husband and wife team and the wife is the boss. She was very unprofessional and rude, even though all the time I have gone to the store I have paid for the new tank, she did not want to know, no even want to read the literature that I had bother to print and take to the store so as to educated them about cracking tank. I will stair clear from this store as that lady cannot survive or knows about customer's service, not naming the store but located in Browns Mill, NJ. I went to the original store that I had purchase my Evod, FIREHOUSE, in Cherry Hill, posed the question " why do the tank crack", within seconds they gave the answer and recommended a glass/pyrex tank and I purchase the tank only for $9 and my cracking tank problem is solved. Lesson, avoid unprofessional stores as they only want your money and not your loyalty