7. Stay out of the water
Do you have the one friend who spatters you incessantly while you swim on the beach and deserves to learn a lesson? Are you scarring your roommate in developing a deep fear of basic hygiene? Then this is the roommate trick for you – but it requires a lot of setup.
Make sure you plan the Roomie Movie Night well in advance. Then after your screening of throat When it's time to rinse off at bedtime, be polite enough to let your roommate go first. But to have a nice shower like this you need to talk to the props department of Universal Studios.