It works after it builds a layer on the lens
*Update* it’s seems that after a week of applying it everyday it built up a fog proof layer. As long as you don’t touch the lens or get it dirty you won’t have to reapply. I went 14 days before wiping it again but that was due to a dirty lens and not it fogging.<br /><br />Pros: it does stop the glasses from fogging. Instead of fogging under heavy hot to cold or cold to hot it’ll just shows small moisture beads allowing you to still see. It’s also a lot easier to apply than than the liquid anti fog.<br /><br />Cons: it takes 2 wipes everyday or it won’t work. You have to use 1 wipe per lens as the wipes are barely wet. If you touch the lens or try to clean off a smudge during the day you’ll have to use the wipes again.<br /><br />Conclusion: I suggest you buy more than 1 box as you’ll go through it faster than you think.
Rating: 5 stars