What's the best Glass cleaner to use? I always end up with streaks and it makes it hard to see anything. Is it best to use paper towels, microfiber, or something else? I'm having a hard time keeping my new car clean. It's black and I've had to wash it three times. Everytime it ends up with water spots. I'm open to any suggestions for cleaning the rest of the car as well as the glass. Thanks so much!