I remember I had an email asking why is it burning taste , and after some back and forth, only to find out the guy dripped 1 drop of juice in a carto and 'thought' it would last for a day... hehehehe..It seems like a bunch of people start the "too harsh" threads and 1/2 of the time they don't fill the cartos enough so they're trying to inhale the burning wick material. FYI