It is hard to stay clean and tidy in the dorms, even for the most organized of people. For a number of reasons, you just won’t have the same energy and drive to put things away or keep things in their respective places. I attribute the aforementioned to a number of factors that are not present in high school life.
Number 1 is the roommate. This beastly creature can be your best friend or your worst enemy. He or she can share in your aspirations of a clean room or destroy any hopes you have of ever achieving such. Imagine your new dorm room is a person--except this person now has two personalities. No matter how well the two mesh, there is bound to be some clash and discomfort.
In my opinion the number 2 reason is the shock of new-found independence. The world just got a whole lot bigger. That is right. Mommy and Daddy are gone, everything needs to get done and you need to do it. This increased workload often forces the best of us to push our organizational skills out the window and spend that precious time recuperating from the night before (whether it was studying for a midterm or winning the local beer pong tournament).