I understand it is not as easy as taking some probiotics, but you have the chlorine dioxide part wrong regarding bad breath. When I say mouth washes that contain chlorine dioxide, I do not mean the commercial Listerine mouthwashes you buy at Target, any of the crap there, if that is what you mean. They do not contain chlorine dioxide.
Here is some info I googled real quick.
Mouthwashes that contain chlorine dioxide, or its parent compound sodium chlorite, have been used in the treatment of bad breath. Research has suggested that chlorine dioxide's mechanism of action is twofold:
Chlorine dioxide is an oxidizing agent (this means that it releases oxygen). Because most of the bacteria that cause bad breath are anaerobic (meaning, they prefer to live in environments devoid of oxygen), exposing them to an oxidizing agent can help to minimize their numbers.
Chlorine dioxide has the ability to neutralize volatile sulfur compounds. It also has the ability to degrade the precursor components utilized by bacteria use when making VSC's. The net effect is that the overall concentration of volatile sulfur compounds found in a person's breath is reduced, and as a result their breath will be more pleasant.