Check out the master cleanse. You can get a bunch of info and the recipe online. It's basically lemon juice and stuff for ten days. Supposed to clear you out. I did it back in the summer, and Meticode did it a few months ago and started a thread about it.
It tells you to do a salt cleanse too (basically salt to make you crap), but don't do that. It's the worst. Take a laxative or something every few days.
Yeah I remember Meticode doing it. Reading his logs got me a tad bit discouraged though. But it's on my to-do list for sure.