Rain-X AF21106D Glass & Mirrors Anti-Fog Treatment, Prevents Fogging & Steaming on Windshield and Visors, Improves Visibility, Great for Auto & Home

This stuff works really well. HOWEVER, it can be extremely confusing to know how to apply correctly as instructions don’t go into detail. Went through many many trial and error with this. After 2 cars and 3 bathroom mirrors here’s my findings.First obviously you have to clean surface well. Either soapy water or windex. Use paper towels. Then wipe area dry and clean off streaks and residue. Again use a clean paper towel.Second apply just a FEW DROPS (2-4 depending on area, no more than 4) to a folded paper towel. And GENTLY rub on surface keep area to about 6 or 8 square inches. Then again a FEW DROPS 2-4 for another 6 or 8 inches area. Make sure when applying there’s no moisture. The second there’s moisture it will not work.Finally, another clean paper towel GENTLY wipe away any streaks or minor smudges so glass is clear.TL:DR Key takeaways.Clean area wellVery few drops (2-4) of the stuffGentle application to limited areaMake sure no moisture on glass when applyingGentle wipe at end

Works well for cleaning windshield

Not only does it clean your window and make it fog free, it makes it crystal clear

Used on my bathroom mirror and low and behold no more fogging mirror works as described very easily to apply will buy again

Bought before a 9 hour drive for the holidays as temps had been up and down, and I thought this would eliminate fog on front windows. Washed windshield with a generic brand vinegar windows spray, then applied this product as a preventative measure to just the driver's side. Followed package directions to apply product then wipe down with a dry towel, but maybe didn't have enough elbow grease at that angle, and couldn't remove all streaks. During the 9 hour drive, the passenger side remained crystal clear, while the driver's side with this product fogged up and remained streaked. I would have pulled over and bought more generic vinegar window spray but didn't want to delay my trip by a 20-30 minute pullover, so I just kept wiping the windows clear at traffic lights (yay backroads).Maybe the problem was cold temps at application? Maybe I need weight training to de-streak the minivan window? At any rate, generic vinegar window spray and running the front windows defroster was enough to keep one side of the windshield clear so I plan to just do that next trip.

This really works!

Used on inside of car windows , followed instructions , but looked greasy , no matter how long I kept wiping, and was hard to remove with window cleaner so I could see where I was going.Might try it in bathroom mirror.

Applied it as directed, it definitely cuts down the amount of fog but not as much as described and because the fog isn't sticking it just leaves condensation droplets. Would rather just deal with the fig and not have my window be dirty