Natman63:
I have to jump in here. I'm on my 2nd REO, and I've finally got squonking down. I tried the "just til you see a bit of juice in the cup" method and continually flooded it.
I tried the blind squonk by "feeling a change in the air pressure" and still no joy (and still flooding it).
Finally, someone mentioned they couldn't blind squonk by "air pressure" but they could hear a "gurgle". So, for me, where I wound up was:
While drawing on the dt/mouthpiece/etc. and not firing the atty, listen for the first sound of a gurgle, BUT ALSO, if you feel a pressure change, stop. I also found I get a slight burning throat hit eventually, but that's NOT the time to re-squonk. Whenever that happens, just do a hard short dry hit and try it again. Good for a few more nice hits. When that no longer works, THEN re-squonk.
Might not work for everyone, but it's what finally got me to stop flooding it.