I suggest that you use mint oil. You can get it at the health food store. Put a couple of drops in your water and sip on it all day. It is refreshing for your oral cavity and helps with digestion. When it gets into your intestines where we absorb our nutrients, it will sanitize your whole system.
Let me know of your results. It is also advisable to get the organic essential oil. If you have a garden with mint growing profusedly you can make fresh mint tea.