Please choose the correct ending to complete the given sentence: Health: [header] How to avoid common hygiene mistakes [title] Brush your teeth. [step] You should brush your teeth multiple times a day. Most dental hygiene experts suggest brushing two times daily, after breakfast and before you go to bed.

Ending1: This avoids toothpaste, which could irritate your gums. [substeps] You should not brush too hard while eating. Ending2: You will also need to brush your tongue at least twice every day, so if you get your tongue dirty, that can be dangerous. [substeps] Brush your tongue only if you have dirty mouth and brush in long strokes. Ending3: This will help prevent tooth decay, gum disease, and bad breath. To make sure that your overall oral hygiene is at its best, you should also floss daily. Ending4: Brush twice a day, after lunch, and at night. Brushing once or twice a day drains water from your body and encourages your teeth to grow and can lead to tooth decay and gingivitis.

Answer format: ending1/ending2/ending3/ending4