Thanks to my dark hair it's pretty noticeable when my eye brows are out of place. I also have thinner brows, and not from over-plucking because I try not to pluck too much. Unless of course I'm closing in on a unibrow. Then I pluck.
I have been setting my brows with clear mascara for about 10 years. It works okay, but I would usually have to check myself every so often and make sure I didn't have a stray. I just dealt with it because I didn't think any other product would be better.
The Anastasia Beverly Hills Clear Brow Gel. I never thought that I'd spend more than $5.00 on something to keep my brows put. But I did, and I may not ever go back. It's like a strong-hold hairspray! No joke. The best part is that it doesn't look wet once it sets (a problem that I had with the clear mascara). It looks completely natural.