I have two NR 360, one is that exact model and at this time of year it runs dry for me at 30% exactly. My other one is the newer model, and it runs so dry that keeping it at 30% was a fight.
Maybe I just have a really dry house?? I have a Version 2 and a Version 3 NR360. Did you get one of the fancy new dome models? NU1 or something? I'm so tempted to get another NR360 just so I can "keep up with the Joneses" LOL.