My ss choice stealth has been working pretty well for the past few days. I bought a 30ml of super high tobacco flavored juice, added a few drops to a blank cartridge, and it's done great. But tonight I've noticed the vapor suddenly tastes burnt. It's not the catridge because I've tested a few of the ones I have and they all suddenly taste burnt. I wonder if it has to do with the atomizer, and if so, should I clean it and how?