I've always (until those wipes) been a fan of RainX (middle) as a rain repellent on the outside windows. It takes a little bit to make sure there aren't streaks on the outside of the window; it's like waxing a car. The product applies easy and wipes off easily too; just spray it on, wait for it to turn to a haze and then wipe it off. I've used another product by RainX also, it's a dual product that is a rain repellent and cleaner in one and it works really well. If you're in a hurry, you can spray it on the windshield and turn the wipers on.
And the last product is by Turtle Wax. It's a headlight restoration kit (left). Here are my results:
They have a one step application unless your headlights look like mine...then it becomes a 4 step process, but it's all in the one box. I'll admit my arm was a little tired afterwards, but I'm very happy with the outcome and it didn't take very long.. This was the cheapest product on the shelf and it worked really well. It was $8 for the Turtle Wax kit while the other products were $15+.