HTC VIVE Pro 2 User Manual page 31

31 Headset and link box
Cleaning the headset lenses
Use the cleaning cloth provided in the box to wipe the headset lenses.
Make sure the cloth is dry before using it to clean the lenses.
Wipe in a circular motion from the center to the outer edges of the lenses.
While cleaning the lenses, do not scratch the lenses nor disassemble other parts of the headset.
You can also use an air pump to blow away dust and particles from the headset lenses.