All Natural Mouthwash: An Ancient Practice with a lot of Flavour.

Simple, easy and most likely all ingredients are already in your pantry.
Many traditions have used various vegetable oils as mouthwash. In ayurveda, sesame oil is used. A small amount is all that is needed to swish around vigorously in the mouth. The longer you swish, the more the oil mixes with saliva, drawing bacteria and toxins from the mouth to be spit out and rinsed away down the drain. Rinse the mouth with fresh water a couple times, brush your teeth and you’re good to go. Rinse the sink with hot water.
My preferred mouthwash involves a handful of dried clove buds added to a bottle of sesame oil.
For a milder rinse, use the whole buds, and try coconut oil. Crush the buds for a more intense mouthwash.

Other spices to try:

Cinnamon
Cardamom
Ginger
Vanilla pods
Licorice root
Many of these act as disinfectants as they have antibacterial and antimicrobial properties and are also used in aiding issues of the mouth and gums.
You are essentially making an oil infusion. Pick your favourite or make a blend. Chai spice mouthwash! Remember, each day your infusion will intensify, so start out mild and by the end of the bottle you could have quite the potent rinse. A small bottle will last a long time as you need only a tablespoon per use. If the bottom of the bottle is too strong, add more oil.
If sesame is not on hand or your oil of choice, try olive or coconut.
Choose a good quality oil, as well as spices, preferably organic or pesticide-free.
In ayurveda, bad breath can be attributed to an improper diet. If you experience chronic bad breath, consider making a few dietary adjustments to restore balance to your digestive system, naturally.
In the meantime, nourish your teeth and gums with your own flavourful mouthwash.
Enjoy!