Well, I can chime in on this. Because even as an experienced vaper I still get this taste all the time, but I know the source (usually). More than likely its one of three things. First and for most, if its a brand new atty/carto it very well might be the priming liquid they use. It tastes god awful, makes you choke and gag, and once you know the taste of that stuff, you will never forget it. Another thing it could be, If you are vaping a fruit flavor, esp berry flavors, its the flavoring the company used. This problem can sometimes be solved by steeping the juice. Take the lid off the bottle, put it somewhere safe and let it get some air for a few days and give it another go after the wait. If it is less chemical tasting than you found your issue. Sometimes, like in my case with raspberry flavors, no amount of steeping will fix that odd chemical taste and you might have to move on to another flavor you enjoy.The last thing I can think it might be, is if its more of a burnt chemical taste, it could be your atty/carto that you are using. If you didn't burn it too bad, I would give it a good rinse under the sink in some hot water, dry it out for a bit, and try and give it another go. I remember when I first started vaping, almost every atty/carto I used I burnt and I would get that burnt flavor for weeks, and sometimes the taste would never go away. I solved this issue simply by understanding how to prime my atty's/carto's, and learning to wait a bit after filling for the first time before firing it up. Sometimes, esp with a few brands of carto's I have used in the past, it don't matter how long you wait or how good you primed it, its just gona get that burnt flavor no matter what, and you have to find a better made carto (or atty).