Nerdwax

This wax works. It does get better if you really clean the bridge/pads well before applying, and then apply a few times in the first hour or so--build a good base coat so to speak. And yes, as others have pointed out, it will wear off and you need to reapply. It's like lip balm or something else topical--it needs touch-ups. Usually I reapply every morning (24 hours). Doesn't bother me--Wedgees work too, but wear out after a couple of months and are UGLY!

This is quite a novel product, the idea is simple - it's a wax that you apply to the bridge of your glasses which is supposed to stop them slipping down your nose.

When I first tried it it seemed to work really well, it set as you would expect a wax to do and seemed very effective at stopping the glasses slipping. However after using it for a week or so I'm not so sure, it does have a few flaws.

For a start it takes a while to set, so if your glasses slip before it sets then this obviously messes it up a bit. Secondly it does wear off after a while, so you either need to reapply it or only use it for a short time - eg if you use it when going jogging then it might be OK.

There are a couple of other problems also though, for example if you go out in the rain and then need to take your glasses off to clean them then you break the wax seal when you take them off. I also find it just doesn't seem to work sometimes, I don't know if this is through not applying it as well or maybe moving my head about more or something else but whatever it is the effectiveness is inconsistent in my experience.

The main thing is though that if your glasses are slipping you should really go and get them tightened up, and then they'll fit properly! That said if for whatever reason you can't do that I would recommend trying this, it's probably quite subjective as to how well it works for different people and the product does seem to be made with the best intentions, who knows with more development maybe they'll make better versions in the future.