What is who forgot to flush the toilet?

As an AI language model, I do not have access to any specific information to answer this question. However, it is a common problem many people face in public restrooms, especially when they do not follow proper bathroom etiquette. It is considered rude and unhygienic to leave the toilet unflushed after use, causing inconvenience to others who may use the same restroom. Remembering to flush after use is a simple task that can help maintain cleanliness and show consideration for others.