huh, odd, it's a link to an article on this site, go to articles, it's there, fifthed row under others, second link says 'Chakras' click that one. cleaning your chakra's are simple once you get the hang of it, but it's a long explanation i don't feel like typing up when the informations already on the site.
basically focus on a ball of energy at each chakra point, each a different colour [from the root it's red, orange, yellow, green, blue, violet, and white] visualize it spinning, focus, but don't straign yourself, on the orb, the colour becoming rich and vibrant, think about what each chakra is for [example, the root chakra grounds you, makes you feel safe and secure] once you feel you are ready to move on, slow the spinning orb, but not to a stop, and move to the next chakra, but always remember the other ones behind it. normally what i do is quickly glance over each chakra before moving to the next one [root, root to sacral, root to sacral to solar plex...] then one i've opened them all, i visualize the orbs dissapearing, but the light remains [since you should always keep your chakra's open, even a little]
as i said before though, read the article.