AirMini user. I had the same reaction as bmonster. This is not the first time for me. I am a mess. This happened a few months ago. I have wasted $1000 on buying this machine. My next 3 days at this conference will be trying to stop the sneezing which turns into annoying cold type symptoms. This machine is not for me! BTY I do not have any problem with my ResMed home unit.