There are a few things you can do to clean a chicken coop with a dirt floor. First, vacuum the coop. This will remove all the dirt and dust that has built up over time. Second, use a mop and bucket to clean the floors of the coop. Be sure to use a light-colored cleaner so that you don’t damage the paintwork. Finally, use an air freshener to cover all of the surfaces of the coop and leave it for an hour or two before returning it to its normal condition.