This is a precision job. Cut the film in the shape of the windows.
Set cutouts aside on a glass board or an area devoted to cut film.
Spray the side window with the soap and water mixture. Use a razor to go over the side window to remove any residue. Use a 4-inch squeegee to get rid of any residue from top to bottom. Apply the tint to the side window. This will be covered when the window and door are closed.