[simpits-tech] MBUs

[Inventmd at aol.com]

OK,
Silly question.
I just bought an MBU-12P Oxygen mask.

How do you clean it?  
Do you need to unscrew everything and soak?  Or do you simply wipe down with 
alcohol.
I am imagining all sorts of residual stuff lurking in the O2 hose.
Does anyone know if O2 goes thru the hose 1 way (on inhalation), (and goes 
out another way-not thru the hose) ? 

We are a crazy bunch eh?

John