When most people think of the prototype of the Boeing 707, they will think of the Boing 367-80, N70700, which was popularly known as the “Dash 80”, but this was an earlier development first ...

Don't use windshield-washer fluid, as most contain antifreeze, which can be harmful to your hands and dangerous to pets. P.S.: If you live in a very hot, sunny climate, check the wiper blades often.