Unless Apple has truly screwed the pooch, this has been a solved problem. Sometimes, if you are purposely trying to work out with a VR headset, you just wear a

Unless Apple has truly screwed the pooch, this has been a solved problem. Sometimes, if you are purposely trying to work out with a VR headset, you just wear a headband to catch the sweat. Most headsets also have cheaply replaceable or even machine washable face "gaskets". If the idea of any sweat in your poor device saddens you, just point a fan at yourself while you work out.