My kids have had to deal with some roommate issues but THAT one definitely hasn’t been an issue.
Some to add to the list:
Ask before using anything belonging to your roommate or have a dialog about what can be shared and what is off limits.
Make an attempt to try to work things out and discuss things between the two of you first before complaining to a) other students or b) faculty or staff. Open communication is a good thing.
Talk about things right away. Don’t let things build up so that a mountain is made out of a molehill. Again, communicate.