Little off topic. When I first started vaping I received a sample of a juice with a order, all I remember is that it had a eagle on the label and it was a tobacco. Sitting in the car vaping, enjoying this new juice then my wife sat in the car and she almost barfed cause she said it smells like locker room feet. I've come across a few vendor juices that have had questionable exhale smells that my wife lets me know, then straight into the bin they go.
The variances of why its tasting burnt has pretty well been answered