If you still have bad breath after brushing, you can follow the following steps: 1. Lemon or Orange: Vitamin C kills bad breath-causing bacteria. And lemons or oranges contain a lot of vitamin C. So if you feel bad smell in your mouth, you can eat lemon or orange. 2. Chewing gum: Chewing gum of various flavors is now available in stores. However, sugar-free chewing gum can prevent bad breath. When chewing gum, saliva is secreted in the mouth. It clears the bacteria produced in the mouth. As a result, bad breath is easily removed. It's not my advice, it's a doctor's advice