I have only been vaping for a few months but the best advice I have is stay hydrated. A few weeks ago I got a new flavor in the mail and was vaping it hard that night. It was frustrating because the taste was off and I thought it was my equipment. After 2 hours of cleaning, putting new coils in, etc. it still tasted bad. Finally I gave up and went to bed. When I woke up the next morning I tried it again and it tasted great. Upon reflection I realized that I had not consumed any liquids at all much less water the night before because I was too busy being excited and frustrated with my new flavor.