I was dubious that this would work-so far so good, been using it for few weeks and as long as I remember to top up on my glasses to make sure that its not rubbed off then it works ,am also using it on my headphones and also works well, the only flaw is that if you have a very small bridge on glasses then you have to use some means such as brush or finger to spread across that part of glasses( perhaps a thinner stick or maybe the end you use being tapered similar to lip stick!!!!

I use this every day now, working in full PPI i get hot and with a face visor cant push slipping glasses on. This is a definite improvement. I apply every morning and dont have to reapply till med afternoon. The stick is small but i think it will go a long way. Good value for money!