In general I would recommend a thorough cleansing regimen for the liver, gall bladder, colon, kidneys, blood, etc., heavy use of digestive enzymes three times a day on an empty stomach, niacin, chelators, etc. and measures to make sure that the liver is at optimum health and the bile ducts free and flowing. I would also recommend measures to boost the immune system and the adoption of a diet and lifestyle that were as healthy as possible.
Actually, benzene detox looks like a good subject for investigation and a new article. I'll try to put something together soon. I am in the middle of a number of projects and responses to people, but I know that time is important.