how long do the ceramic coils last before they must be completely disposed of and cant be cleaned and reused?

Answer:
Yocan Regen Kit adopts the latest dab pen technology to provide highly advanced concentrated vaporizers to give the best vaping experience to the users.

As for the ceramic coil life span, it depends on your vaping frequency, the ceramic coil usually can last a week.
If the vaping flavour is bad, it's time to switch a brand new coil.