Also, to add: as a bike commuter you need to be creative, improvise and see things in a way others don't. You can take all our advice but it may not work in your particular situation, so take it as guidelines and tweak for your use.

For instance, I don't put my wet morning clothes in a bag, I don't have to. I find a place that is warm and/or has airflow and won't be in anybody's way to hang my stuff to dry so I can wear them on the way home. I wear merino tops so they don't smell. Examples: back of my computer or monitor, back of a copy machine, a boiler room, a server room, maintainance room, etc., just make sure people in the area know. Some people who park bikes in the provided bike shed leave their shirts on their bike to dry. I can take mine to the office so I have an easier task. Look around for opportunities to store and dry your stuff without offending or inconveniencing anyone, or without breaking any fire regulations. Be friendly with people who have access to areas you can use for changing and storage, like that broom closet