Useful-ish.
I haven't figured out how to make this work exactly perfectly. I washed my glasses, with soap and hot water, then put this on as indicated. It did keep the glasses from sliding down but I found at the end of the day, the wax had turned into a sort of sad oily paste. Now, it didn't clog my pores, and it didn't seem to cause any distress for my skin, either. I don't know if you're supposed to let it cure overnight, maybe? One waxes a surfboard more than once, so maybe this is the same thing. I'll use it now and again, but don't think it's going to be a one time thing, and then done. If you're constantly fighting with your glasses, as long as you're okay with washing them and then putting this on maybe once a day, I'd recommend.
Rating: 3 stars