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A big huge thank you to all of you, especially Pugsy whose detailed answers and references inspired me to do the unthinkable: read the manual. Between all your help and the manual, I realized that:
1) Make sure the heat icon is orange. Other colors means heated tube is disabled.
2) When #1 is the case, the knob controls the tube temperature. My tech told me it controlled humidity, which is incorrect in this case. And I think that contributed a lot to my confusion and difficulties.

So, with the manual in hand, I set the humidity to low and the tube temp to high and although the tube doesn't feel "warm" to the hand touch, you can feel something a little. And touching your cheeks or lips to it and then doing that to something else that is "room temperature", I can feel the difference clearly.

And last night went great. In fact, the air was too warm and I turned it down I think.

It's great to have such support with this.

Thank you!

Glad you got things sorted out and now you know why I say that the hose doesn't get all that "warm". It's difficult to describe for sure and difficult to feel the difference it is ever so slight. It warms up some but it isn't "warm" like we would expect because most of us expect to experience a lot of warmth when we touch the hose but it doesn't work out that way.
I think I originally thought it would be really warm...like electric blanket warm....and it just doesn't work out that way.
Even when I was using the Hybernite stand alone heated hose (this was before the machine integrated heated hoses) and it's heating function was a continuous heat...it wasn't electric blanket warm unless I covered the hose. Now when I did that...yep, it was uncomfortably warm.

Too bad your tech steered you wrong and compounded the problem. Before heated hoses..that knob did control the humidity but now it isn't the case unless someone is in the setup menu and if a heated hose isn't used it is still the case.