Buy books, and you don't need a Kindle, but that's not the point smacky; the point is that e-ink is far far better for reading long text passages on than any currently available tablet, and the format is far better with regards to battery life.Nothing. If you use Rain-X, you don't need wipers.
Oh, and to quote rain-x.com; "Wiper blades should be replaced every six months to a year or as soon as you notice a difference in driving visibility... ...iper blades are necessary... ...Remember to check your wiper blades as part of your regular preventative maintenance program!..."
Seems they're not only needed, but highly recommended by Rain-X's producer themselves. How much more wrong you going to be??