Very confused [problem: exhale with nasal pillows]

[DavidB62]

Mike, I have what I think is maybe the same problem. For me i will be doing just fine and then suddenly I cannot exhale, it is like a valve has slammed shut and the air I am trying to expell can't go anywhere. Then i will inhale and the very next exhale is fine. On some instances it will happen several times in a row then just goes away and all is well. On other ocassions the problem comes and goes for the rest of the night. 

Sometimes it is a complete block and others just a quick interuption i would say and then I can exhale.

I ended up getting a new machine, same one, and now I am experencing the problem again.

Please let me know if my issue is like yours.

Thanks

David