Place 1 or 2 drops of peppermint pure essential oil on the tongue or drink peppermint herbal tea. However, be aware that large amounts of peppermint oil can cause digestive upsets. Another home remedy is to try chewing a pinch of fennel seeds after meals. Anise seeds or cloves can also be used. Parsley is high in chlorophyll, which has been recognized as an effective breath freshener, therefore chewing a fresh sprig of parsley after meals or when needed, will also assist bad breath.Avoid drinking coffee and alcohol. Do not smoke. Clean your teeth after each meal. Floss at least once a day.Use a tongue scraper or moist toothbrush to scrape off any coating on the back of the tongue.