When aging your liquor or wine in an oak barrel and you aren't going to fill the barrel to the top then you should rotate the barrel one quarter turn about every 1, 2 or 3 days so that the liquor or wine will soak evenly in to the oak barrel. This will help to make sure your barrel does not dry out on the top and also make sure it soaks in to the barrel evenly. It will also help to age your liquor or wine faster too. http://redheadoakbarrels.com