After having cleaned the window, the Prefect turned around and faced the classroom. He looked around for a moment to watch the other students cleaning the room with the use of magic. Shaking his head, the Slytherin walked towards the back of the room and found a desk that was still dusty.

He brushed his finger over the surface of the desk and when he looked at his index finger he saw grey dust on it. Brushing the dust off on his pants, he then grabbed his wand and pointed it at the desk in front of him.

"Scourgify!" he said and watched how the dust vanished in to thin air and a few seconds later the desk was dust free.