I had a similar problem when I first got the booster for my ego. I was using a 1.8 ohm atomizer and switched it for a 2.0 ohm problem solved, I'm not sure what you're using for your e-cig but maybe it's too strong. For me the other problem was that the tip of my tongue and roof of my mouth felt burnt. That's gone away now this was when I first got the booster.