Why does the head of the block order the men to clean the barracks before leaving?

The head of the block orders the men to clean the barracks before leaving to maintain order and discipline among the inmates. This task serves as a final reminder of their responsibilities and the importance of cleanliness, even in dire circumstances. Additionally, it helps uphold a sense of dignity and respect in an otherwise dehumanizing environment. Ultimately, it reinforces the authority of the block head and the structure within the camp.