A qualified solution
Unfortunately, as its container suggests, Nerdwax is a little like lip balm: It requires regular application to work. Using Nerdwax is unquestionably better than using nothing at all, but it doesn't stop glasses from sliding down the bridge of your nose entirely. While Nerdwax is on, I find that my glasses still slip down my nose, just not as far and way less often. I'll probably be a lifetime user, despite the product's imperfections.
Rating: 4 stars