I joined this forum as I thought I'm the only one having this issue with Airmini. I have the exact similar experience as @bmonster described. I actually stopped using it for about a year due to these reactions. About 2 days ago, I decided to give it a try after cleaning all the parts. I woke up feeling great except that I started having these reactions described by @bmonster. As an experiment, I just ordered a new N20 System Setup Pack to see if a new set of tube, connector, etc..would make any difference. I'll give feedback once I've completed this experiment.
