I appreciate the feedback, and while I entirely understand where you all are coming from, this was clearly an issue beyond a simple need to increase temperature.
I was on level 2 with relatively dry herb. I was getting rather big rips on my first, second, and third hits -- each one a bit bigger than the previous. Then, on the fourth hit, ZERO vapor came through -- none. Went from having clean, and what I consider rather BIG hits, to having absolutely nothing at all. And as I mentioned, the air coming through was noticeably hotter than the air on the previous hit.
I'm thinking it was related to something going on in the bowl of the stem, and not a mechanical malfunction with the Solo. Reason I'm thinking this, is because when emptying the stem after that session, the herb was very sticky, and was essentially stuck to the stem. It didn't fall out like every previous chamber-full (that I can recall) has -- it was gunked up. Something went a bit haywire in there... not sure what it was.
Anyhow, I'm about to pack up some more bud. Will edit this post with details of how things go.