Well before applying you should know how to apply as because the way you apply will show you the result, In my case well I washed the glass area with shampoo after that I wiped all the water and let it dry after that I used sprayer(collin empty bottel) and sprayed two coated and let it sit for 5 minutes and then wiped gently with microfiber cloth. After that the result was awesome.
In high speed you don't need to use wiper in rain.