Edit: You beat me to it CAV! Here's my original post anyway:
I think what CAV was eluding to was crypto and possibly some other things.
I've heard that the only real way to get rid of crypto is to expose the cage, etc. to steam, like through an autoclave. Though I doubt any of us have access to an autoclave, except those in the medical professions, and even then, I'm sure their work wouldn't want them bringing in snake husbandry stuff to autoclave. I know when I worked at a vet hospital there was only one staff member that was allowed to do anything with the autoclave. I think it was because it was so expensive they didn't want any of the rest of us to screw something up, but this is getting off topic now.
I'd say that a bleach/water solution (I think 1:10 is what is generally recommended) will kill the main "bugs" you need to worry about. However, you might want to consider getting something called Clorhexadine Diacetate (also called Nolvosan). It's the only thing we ever used to disinfect stuff at the vet hospital, aside from the autoclave that is. I think the Bean Farm sells it.