I have the Smoke 51 Duo and after posting in this forum, I finally cleaned my carts out correctly, allowed them to dry, and had lots of awesome vaping yesterday with my new Dekang Desert Ship eliquid but something weird happened....suddenly, the flavor turned from a wonderful, sweet, tobacco-ish taste to a burnt metal taste that almost made me throw up. Keep in mind that I had been using this same cart all day, topping it off with eliquid when the vapor began to decrease, so I assumed that it was the cartomizer going bad after all that use, as I do realize they are disposable. No biggie, I thought. I grabbed another and put it on...same taste. Then another...same taste. Suddenly, they ALL taste like this metallicy, burnt metal taste and it's so great, I can't stand to vape and I'm getting really close to just smoking again. My first ecig caught on fire after 2 weeks so I got it replaced a week ago and now this?!? It was working fine ALL day and now I've tried 8 different carts on it, all cleaned and refilled, and they taste terrible. I figured maybe I screwed something up when I was refilling, so I put a brand new Smoke 51 cart on there....still same taste! It has NEVER tasted like this, ever, does anyone know what this could be? Thanks so much for any replies!!!