The machine has two tubes. One goes from the side of the unit into the water; the other tube goes from the back of the unit into the cylinder dryer.
The side air tube makes bubbles in the water, so this is an exit point. From the back tube, all I can feel is the air continuously coming out from the remaining open 3mm hole in the cylinder. So, this is an exit point too!
Astrologically we’re under the influence of a Mercury Rx period. That might explain why I’m still confused :)
I’m providing a picture of the unit, captured in YouTube