Wax vape pens will use either wick, ceramic, or quartz coils
Despite mountains of evidence demonstrating the harm of menthol, the FDA did not act until April 2021 when a federal judge ordered the FDA to propose a rule banning menthol within one year, as a result of a Citizen Petition by the Public Health Law Center and the lawsuit filed in 2020 by the African American Tobacco Control Leadership Council, Action on Smoking and Health, the American Medical Association and the National Medical Association
I read in a well-meaning, but misinformed (and mis-informing) posting: (paraphrased) the blown fuse occurred because the corrosion resulted in more current being needed to be pushed through the circuit (or something to that effect)
In the past, it could only be obtained duty-free, so if you saw it in Korea, you had to suspect it was a fake , but now, although it is not widespread, it is being imported officially
It can be made of ordinary glass or high borosilicate glass for better performance