My coils have been going bad really quickly. They don't taste burnt, however there is a drop in vapor. The main issue though is the taste of the liquid. I'm vaping BB and after less than 2 ml it goes from a sweet tobacco flavor to a caramalized, not-quite burnt rendition of the prior. I was wondering if anyone has any experience with this. I thought there were good coils and doa coils, is there a such thing as coils that go bad quickly? I opened up a new pack of coils and will see if the desired flavor persists longer. I'm vaping at 4.1 volts on an eGo Twist with a 2.0 ohm coil, which according to my calculations comes in around 8 watts.