I made a DIY juice at 24mg nicotine and it tasted quite harsh on the throat. I've eliminated hardware issues so it must be the nicotine. It gave a "hot peppery" sensation to the throat that lingers after a vape. Interestingly, once I add some menthol, the harshness is gone and it goes down smooth. What are some other ways to alleviate the harshness without lowering the nicotine concentration? I've heard that certain tobacco flavors can also help. I'm not sure why though. BTW, maybe the nicotine I got is of poor quality? I've tried 24 mg juice from pro venders and it never gave me this problem. Thanks