[ChevLoRay]

I like the idea that Rain-X could make use of wipers unnecessary in a lot of rains. So, I bought some and tried it. When I wasn't satisfied with what it was doing, I turned on the wipers. After a little bit, the wipers would start hopping and skipping (sounds like fun, huh?) across the windshield. So, I knew that my application technique was suffering.

Before you start to apply Rain-X, put something on the glass and watch how it slides down, from top to bottom, of the windshield.
Then, clean the glass, per the instructions.
Before you apply the Rain-X, also use 4-ought (0000) steel wool and then clean it again before you apply the Rain-X.
After you have applied the Rain-X per the instructions, and it is ready for use, put the same item on the glass that you did before you cleaned the glass and watch it now.

I did this before driving to Florida, knowing that a hurricane was brewing in the Gulf. As I was leaving Pensacola, headed to Tampa, the rain began. We were near DeFuniak Springs, FL. We proceeded to drive, in a driving rain, with very little use of the wipers....maybe once every 3-4 minutes....just because. It was amazing! Folks had their wipers running on high. We just breezed on down the highway and were entertained by the droplets as they moved up the glass.