To get to a Happy Ending, we need to make sure the surface is first clean of dirt and grime and ready for the final foam. For a nice safe wash to minimise swirls and scratches, we begin with a touchless pre clean using the Snow Job foam. You can read more about this in this link here:
Now you have a nice and clean car, but it's important you don't yet dry it. The car needs to be wet to give it a proper Happy Ending.