Don’t strap on the Oculus Rift like ski goggles to eliminate smears on lenses from oil on your hair and forehead.
This was one of many excellent tips shared in a great guest article by VR developer Namielus: 10 Tips for Safety and Success When Demoing the Oculus Rift to the Public. I’ve been using it ever since the DK1.
For large scale Oculus Rift and virtual reality demos, check out Kevin Williams’ great article: A Guide to Virtual Reality Demonstrations.