One very iportant fact to realize. All Butane is not the same! Make sure you buy a quintuple refined butane. Do not use cheap growcert store buten Ronson, etc...
Like I said; I have had and used my Iolite for 3-4 years, and because I but "Vector" quintuple refined butane; It still works. It is also a good idea to allow the unit to use all the stored butane every few refills.
Butane lasts for a long time. I buy my Vector butane off ebay from cigar store shops.
One last description about the Ioliye firing and heating mechanism. Iy starts just like a patio gas grill. click, click...pilot light comes on and butane heats up a chamber with a dense metal probe inside chamber.
As mentioned above. Butane never is in same compartment as MMJ, and is only used to heat the apparatus that vaporizes the herb. Peace