Should I use Rain-X on my windshield?

It will not harm anything, what it does do is bead up rain in smaller droplets that the wind can blow away. Those talking of nasty streaks over time probably do not clean their wiper edges. Bugs and small bits of anything sticky that hits your wipers has to be cleaned off occasionally.

Can you put Rain-X on while it’s raining?

Its purpose is to enhance visibility whilst driving in bad weather conditions such as rain, sleet and snow during the day and night. The product can be used on the front and rear windscreens, windows and mirrors and applied inside and out.

Do you rinse after Rain-X?

Typically, it comes before the last rinse arch or rain manifiold. So, with an in-bay, you would want to apply Rain-X before the final rinse pass.

How do you prepare a windshield for Rain-X?