1. Good dental hygiene
Poor dental hygiene is the most cause of bad breath we should always brush our teeth like twice in a day i.e morning and night
2. Water
Prevent dry mouth by keeping your mouth hydrated, mouth dryness often cause bad breath bacause saliva plays an important in keeping your mouth clean. Your mouth dry naturally while you sleep that is why your breath is typically worse when you wake up in the morning so by drinking enough water during the day it will help in the saliva production
3. Milk
It can also be used for bad breath, drink a glass of low or full fat milk during or after a meal especially a meal containing smelling foods like garlic and onions