Steps
Washing the car with car wash soap/shampoo. Make sure you remove all traces of bug splatter and tar. Then rinse and dry completely.
Peel the protection film from the adhesive backing, make sure to soak it in the water & shampoo before removing it. Spray the alcohol solution in centre of the film, squeegee down that section and spray a little more on the next section on either side of centre. Squeegee down again aligning as you can go and stretching as you go.
Once the edges of the film are free of any air bubbles, use the squeegee to remove any bubbles from the centre section of the film. Be sure to work from the centre out and be gentle to avoid tearing the film.