"화장실 사용 후" refers to the actions taken after using the restroom. It is important to maintain hygiene by washing hands thoroughly with soap and water. This practice helps prevent the spread of germs and ensures personal cleanliness. Additionally, flushing the toilet properly is essential to maintain sanitation. Using a toilet paper or bidet, if available, can help in cleaning oneself. Proper disposal of used toilet paper in the designated bin is also crucial to avoid clogging the plumbing system. Following these steps contributes to a clean and healthy environment.