Hi I am just reading posts and I wanted to ask you, does your statement mean that even though your head is not inside the little portable sauna unit, your head area was still sweating?
I have simply been using two portable FIR (Far-Infrared-Sauna) space heaters that I sit between in a small bathroom. And I go in the room when the heat reaches 105 degrees and have the heaters about 18 inches from me front and back. I sweat like crazy in about 5 minutes. I do have to keep moving around till I start sweating as the heaters create hot spots on the body until the sweating takes place.
Does the portable create hot spots on the body before you start sweating or is it comfortable sitting there until you sweat? I would not think you could move around at all in a portable.