Updated: May 27, 2015
RainX - What Does it Do?:When I moved up to the Pacific Northwest about 8 years ago I was suddenly forced to drive in rainy weather and I was not used to it. My formative years had been spent in sunny California where it rains only periodically and you can pretty much avoid it. Up here in Portland, Oregon, you are stuck in the rain from November to April. Driving on I-5 next to big trucks that splash water on your windshield can make for hazardous driving and sudden downpours are always dangerous when on the freeway. A neighbor of mine introduced me to a product called Rain-X which is a spray that you put on your windshield and it helps you drive better in wet conditions. I had never heard of the product and was a little skeptical since I had never known anyone who used anything similar. I must say that after about 2 minutes of driving in hard rain with the Rain-X on the windshield I was thoroughly amazed at how much better my visibility was, and I wasn't even having to use the wiper blades that much. The stress of driving in rain was practically eliminated with a simple solution that you put on the windshield.
How do you apply Rain-X? It's really easy, but first you need to clean off your windshield with a gentle glass cleaner so it's clean. Then, spray the Rain-X onto a dry paper towel or cloth and wipe it onto the windshield glass in a circular manner. Let it dry for a minute - you'll notice a haze appears on the windshield. Don't be alarmed, that is the Rain-X starting to work it's wonders. After the haze has dried, get a dry paper towel again and sprinkle just a little water on the windshield and wipe off the Rain-X haze. Even though it's hard to notice, the Rain-X has left an invisible film on the windshield - actually it has sealed all the microscopic pores in the glass so now when it rains, the water beads up on your windshield and improves your visibility by 50% or more. I have found that driving around town at 35 MPH or slower that the Rain-X works, but not as good as when you are driving down the freeway at 60 MPH +. The water still beads up in town, but the wind flow over the windshield doesn't help at those speeds enough. When I'm on the freeway doing 65 miles per hour, the water literally beads up and disappears as the wind takes it off the windshield. I often find myself going down the highway in a downpour using my wiper blades about 80% less than the guys driving next to me. It's really an amazing product and it's so easy to use that I don't know why other people aren't using it. Beyond helping drivers see in rainy weather, Rain-X also works to help remove ice, frost, salt, mud, and bugs that get on your windshield. In online reviews we read that if your windshield had an application of Rain-X on it, then removing ice was that much easier. Thin layers of frost come right off with a simple squeegee when the windshield treatment of Rain-X has been put down in advance. Even cleaning off bugs from a dirty windshield is easier when Rain-X has been used. How often do you need to spray on Rain-X? I have found that when it rains a lot, I put a fresh layer on every 45 days or so. Some people mention it's more like 2 or 3 months, but in the dead of winter I use it more often. I once heard a story from a friend that using Rain-X would slowly weaken your windshield and make it susceptible to cracks and chips but that is a total rumor that has no truth what so ever. View all the Rain-X windshield products here.