Vive has 3 Krypton Chloride Excimer bulbs that should be wiped off every 3-6 months to prevent dust and dirt build up. This can reduce the overall effectiveness of the unit.
Steps;
1. Power Vive off and wait 15 minutes for the bulbs to cool down
2. Clean off the bulbs using Isopropyl Alcohol Wipes or any Lens wipes