Surely they had to be almost done? Ethan was having an increasingly difficult time finding more things to clean as the entire class continued practicing their cleaning charms on the room. He wandered the room, pointing his wand at random spots that looked even remotely dirty. "Scourgify.. scourgify.. scourgify!"

He soon found himself in the middle of the classroom and his eyes fell on the floor in the aisle between desks. Seemed like many people were focusing on the outside perimeter of the room - walls, windows - and the desks. The floor in the middle of the room was a little neglected. He slowly walked down the aisle, pointing his wand at the floor as he went, "Scourgify.. scourgify.. scourgify!" Much better.