What will clean old brick?

What will clean old brick?
Submitted by Austindownunder

 I wanted to know what I can do to make the brick on my house look better? The home was built in 1978 and I would like the brick to look like those homes that are 10 years old. You said power washing is not a good thing at http://www.millennialliving.com/Activities/Renovation/Stonework/Power-wa.... What options do I have to accomplish my goal?