There is a very good instruction for fitting your mask properly on the MASK ARRAYED blog. Just Google it and when you get to it look for "Taming the Mirage Quattro". Very good instructions.
One other thing. Many of the people on this forum are a little rabid about not overtightening the mask. I use the Mirage Quattro and my CPAP pressure is very much on the high side. The important thing is to tighten the mask until it just quits leaking at your highest pressure. If your pressure range is wide open then your highest pressure is the same as my pressure. It may take tightening it down pretty tight. I get moisture in my mask sometimes but it does not cause any leaks.
If you want to try the "Taming the Mirage Quattro" method, I would advise that when you do you put your machine in CPAP mode, turn off any ramp, and turn off any EPR or Flex. Set the pressure to the highest pressure that the machine can use. For your wide open range that would be 20 cm/H2O. Then follow the "Taming" instructions. If you want more help with this, speak up. We are here to help.
Definitely a learning curve HG. But I like that you're taking responsibility for your own therapy. Good job that.
I see your settings were at the default of min 4 and max 20. I don't know why they think that's such a great idea. My feeling is 4 and 20 is only good if you're counting how many blackbirds to bake into a pie. So 6/17 is a good place to go for now. I prefer a much tighter range than that, but it's good to narrow the gap slowly as you are doing.
I have been sing a heated tube since I started pap. I have never had a moisture problem and I normally have humidity set at or near max.