Rain-X AF21212 Anti-Fog - 7 fl oz. by Rain-X

it is not as good as Costa !

Followed instructions, did it twice, made zero difference!

I use a vape so during the winter my windows get fogged up with the condensate from constantly having hot vegetable glycerine in the air. This stuff is perfect for preventing my windows from fogging up. I used to have to clean my windows every three days but instead I clean them every 3 weeks and then reapply this stuff.The picture does not match what I got, I got a spray bottle which is actually better than what the picture shows.My personal recommendation would be that less is more. Do not apply too much or it will make your windows look worse than before. I usually do one spray on a clean paper towel square per window and then use a separate clean paper towel square to buff it with linear NOT circular motions.I usually use one spray for half of my front or rear windshield leading to a total of two spray per windshield.

I read some of the other reviews on here downing a rain-x product and was surprised to say the least. I bought it anyways, i can see where some people may of had issues removing the residue the product leaves behind after drying. They used to much, use a few drops at a time working into into the window, you'll be surprised how little you actually need to do all the glass inside your car. It does take some work to remove the residue left behind. I used a very small amount of glass cleaner(barely any at all) and wiped the residue way. It is 100% streak and fog free. There is no fog in my car any more, it was a overwhelming problem I was having. I would clean the Windows spotless and less than 2 days later have all my windows completely fogged up. Defrost and heaters weren't helping. This has made a night and day difference in visibility and appearance. But as the tittle of this review said, it is a lot of work to make perfect. I have a garage and a super bright led light i shined on all my glass to highlight residue left behind(a precaution I took after reading reviews on here about hazing during night time driving). Awesome product if you have the time to do it right.

This item has worked very well for me. I despise having to sit in a cold car, but having to sit in a cold car doing nothing while I wait until I can see is worse. This item took care of that for months. Yes, it does wear off over time, but that's because it keeps the windows from getting foggy, not from getting dirty, so a bit is lost every time I clean the window. That's okay: a little goes a long way, and it does work well.

I was optimistic when I got the Rain-X Anti-Fog after watching several video reviews showing its fog-reducing capabilities. I live in a quite humid area, so fog has always been a problem on my vehicles. I applied Rain-X Anti-Fog to half of my windshield to try it out first; the next morning, as is often the case, the untreated areas of my windows fogged up pretty significantly; the area where I applied the Anti-Fog, however, was nearly fog-free! That evening, I promptly applied Anti-Fog on the remainder of my car's glass. Everything was great, until later that same week, the windows started fogging up so badly that I couldn't see out of the car at all. For the next several days, it was the same story — my glass fogged up even worse than before the Anti-Fog. I finally had to give my windows all a good scrubbing with glass cleaner to remove the fog-promoting "Anti-Fog" film off.

I got this for my shower's glass door/walls. It works great! Except......if you rinse it with water, then the magic (err... Rain-X) gets rinsed away too.I watch my TV through my glass shower door/wall and the fog build up is annoying. Can't watch TV through fog!Application: I take a small cloth that I keep next to the bottle of this in my bathroom cabinet, and wipe the area of glass that I plan on viewing from. Only a light coating is needed. You don't need to oversoak the applied area, cause if you do, you'll get a smudge film (haze) that's almost as bad as the fog. It works magic with just a fine film. Everywhere I wiped this, stays clear (fog and haze free). Everywhere else (top, bottom, sides, etc.) is fogged up.But after the shower... I rinse down my shower walls, and wipe the walls/door dry with a squeegee, and next time I shower... the Rain-X is gone. NOTE: It does come off with just the rinse, even if no squeegee is used. So try not to rinse it off if you want it to last.That's the only reason I gave it 4 stars... cause it does rinse off so easily. Maybe a 4.5 stars would be better rated.So if applying in a vehicle... and you are rinsing down the inside of your windows... I think you'll have bigger problems than just fog.