Here are some simple home made mouth wash:

The basic commercial mouthwash may contain up to about 2% of flavor like clove oil or mint, up to 2% of a surfactant to dissolve the flavor and to provide foaming, up to 2% humectants and/or thickener, 25% alcohol, and active ingredients.

Ingredients reported to have an effect in controlling odor include zinc chloride (usually around 0.2%), quaternary ammonium compounds (for example, cetylpyridinium chloride up to 0.05%) and certain combinations of essential oils. The most effective antibacterial agent present in mouthwashes is probably chlorhexidine.

Chlorhexidine containing mouthwashes are good for initial diagnosis and therapy, as well as for post surgery treatment, but are not advised for every day use. Although some investigators have reported sodium bicarbonate reduces bad breath, it is usually ineffective.