Simply pop one into your mouth and dent it with your teeth. The pungent aromatic oil may burn slightly, so keep the spicy clove moving. Continue to bite until the essence permeates your mouth, then spit it out. Don't use clove oil or powdered cloves, they are too strong and can cause burns. Chew on fennel, dill, cardamom or aniseed. Aniseed, which tastes like liquorice, can kill the bacteria that grow on the tongue. The others will help to mask the odour of halitosis. Or suck on a stick of cinnamon Like cloves, cinnamon is effective as a mouth antiseptic