VR headsets can get dusty and grimy. Take extra care with the lenses, which should be cleaned gently with microfiber cloths the same way you'd treat glasses (but don't use liquid cleaners). A slightly damp paper towel (just wet with a bit of water) can help clean off exteriors. It's a good idea to invest in a case or bag to protect the headset from dust, and keep your headset covered when not in use.  Take extra care not to expose your VR headset to bright sunlight: The sun can damage VR displays if beams hit the lenses of the headset. To be safe, I keep mine in cases, turn the lenses away from windows, and cover them with an old t-shirt or towel if I don't have a case.