I sleep allways with AC on 23 Degrees Celsius, and when somebody turns it off I wake up immediately
When I feel ambient air is hot -it is difficult for me to fall asleep
Did you check also correlation to ambient humidity and temperature?
Did anybody use cool humidifier with good results ?

Regarding settings: just from the beginning of use the Weinmann was not comofrtable -with all the auto and non auto settings the local supplier adjusted for me.They said they will check their machine settings -perhaps the machine is faulty Untill I get feedback from them , I will try to test the rec...

Hello I apologize for the capital letters I live in Israel and Weinmann are having a strong "pushing" marketing here. They have a machine that looks very good from the point of Engineering design and appearance but it is totally not customer oriented Also their own recomended mask is not comfortable...