Unfortunately, none of our products are meant for anti-fog. Our Hybrid Wax is totally safe to use on your window, and every other surface, and it also may help with that, but unfortunately, I can't guarantee anything because it wasn't really tested for that purpose.
If you do use it on your window, and it does indeed help against fog build-up, I would really appreciate it if you can get back to me and provide an update. We would love to be able to pass this information on to other customers!