How to Clean Oculus Rift Lenses: 14 Steps (with Pictures)
How to clean the lenses of your VR headset ?
Lens Cleaning Pen for Oculus Quest 2 Quest Rift S HTC Vive Pro Cosmos — Global XR Academy
If you want to protect your Quest lenses from scratches, I would highly recommend the VR Lens Lab Oculus Quest lens inserts. I got the non-prescription lenses which act like a lens