My experience of the educate the customer statement is that you can stand there and tell the new customer all the things you like.
There not that intrested, just want there windows cleaned.
They have selected memory, they only remember what they want, you will be turned away if they want to do that.
I have stood there and explained wfp to custies.
Picked up new custy 3 months ago, demonstrated wfp, said looks like rain drops on glass dries to clear finish.
She phoned to say dried fine would like you to put me on your list.
Now done 3rd clean she asked me why windows were wet and dont i dry off?

The only thing i can think of is her husband was in the car and wondered maybe what i was doing.
But i have many stories similar.
Maybe i just sound like the teacher from charlie Brown