Didn't work well for us
With Covid eyeglasses all fogged up we purchased this.  It kind of works.  The process to clean/apply is much different than regular eyeglass cleaner and you spray, smear it around until dry, and then wipe any streaks off.  The glass still fogged up from breathing but much less than untreated lenses.  Will keep and try again until I can figure this stuff out.
Rating: 3 stars