I use tea tree oil mixed with water to spray down my shower and bath area after cleaning because I know tea tree oil kills mold. In this article Nature Hacks will show you how to get rid of mold using tea tree oil. It really does work and I like it so much better than using bleach or other chemicals.
http://naturehacks.com/house-and-home/how-to-naturally-remove-mold-with-tea-tree-oil/