How do you guys get rid of the black stains on the white Macbook's bottom?

After using my White Unibody Macbook for 3 months, here's a few unsatisfactory things I feel about it.

1. Despite the trackpad's multitouch awesomeness, it hinders typing on the keyboard because my hands tend to glide over it causing it to register a tap. This is because of its large size.

2. The battery does not last as it is advertised. Mine was advertised for a full 7 hours but this is nearly impossible to get unless you just run a browser only with lights dimmed until the lowest. Normal usage with usable lighting will last 4 hours tops.

3. Design flaw in the screen frame scratches the laptop frame surrounding the keyboard. When the Macbook is closed, the screen frame touches the frame around the keyboard and trackpad. I can see a perfect scratch line on the keyboard frame, mirroring my screen frame.

4. Bootcamp drivers are not well made. The brightness control at the dimmest for Windows is still brighter than the dimmest on OSX. Very limited settings for Windows too.

My biggest problem with it is the fact that closing the lid, scratches the damn laptop.

The edge of the screen sits on the palm rest of the Macbook when closed. You can see the frame of the screen/lid jutting out in this image.

Nope, plastic.