My favorite part was how her hair was in a beautiful and much more complicated knot in the premier episode, then it was a mangled mess after Voyager was thrown to the Delta Quadrant, but they make a show of her fixing it into the simpler knot with her bare hands while walking the corridors from one disaster to another.
Janeway commands, and her hair obeys.
Hair mousse, light non-matte pomade?
I honestly don’t know any better, I’ve just been looking into that sort of thing. Pomade has got me the best results so far but I’m horrible at hair and the pomade is a bit too thick. A more of a cream type next time, I think.