Brushing your teeth and rinsing your mouth thoroughly after every meal will remove the food particles that can cause growth of oral bacteria.
• Clean your tongue with a brush or tongue scraper. The tongue is a haven for odor-causing bacteria in the mouth. An inverted spoon can also be an effective tongue cleaner. Keeping your tongue clean can prevent bad smell.
• Baking soda is a good oral solution to your bad smell problem.
• Hydrogen peroxide can kill many oral bacteria that cause bad breath. Rinse your mouth with 50-50 mixture of hydrogen peroxide and water. Don't swallow it.
• Maintain proper oral hygiene. Flossing is important in removing food debris and plaque between teeth that can cause unpleasant mouth odor. Clean your dentures properly. Let it soak overnight in antibacterial solution or as prescribed by your dentist.
• Avoid over consumption of alcohol and caffeine which can cause dry mouth.
• Quit smoking. Tar and nicotine build up cause bad breath. Smoking can dry the mouth, as well.
• Peppermint or tea tree oil can be an effective treatment for bad breath. Add a few drops to the tongue or toothbrush to freshen your breath. It also has an antibacterial property that kills oral bacteria.
• Chewing sugarless gum can lead to production of saliva thereby reducing bad smell. The best gum to fight bad breath is the cinnamon-flavored gum. The cinnamon flavor decreases oral bacteria. Make sure you chew on sugarless cinnamon-flavored gum.
• Chewing on fennel seeds, cinnamon sticks, mastic gum or parsley can also give similar effect of producing saliva in the mouth, as well giving your mouth fresh scent excreted by these spices.
• Eating citrus fruit high in citric acid can help fight bad smell. The acid from oranges, lemons, or grapefruit stimulates the saliva which prevents rapid growth of the odor-causing bacteria. Their fruity, citrusy scent leaves the mouth smelling fresh all day long.