You should remove the Vive Deluxe Audio Strap cushion to clean it.
Replacing the Vive Deluxe Audio Strap cushion
Deluxe Audio Strap Headset Adapter for Oculus Quest 2
Attaching Vive Deluxe Audio Strap to the headset
Removing the earphones from the strap
Adjusting the lens distance on the headset
Headphone Locks for Vive Deluxe Audio Strap Frankenquest Mod
AMVR PU Leather Sponge Cover Pad Head Strap Replacement Compatible for HTC Vive or Vive Pro Deluxe Audio Strap : Video Games
Premium Deluxe Audio Strap for Quest 2 - Buy at Unbound XR
BEST Battery Holder for Vive Deluxe Audio Strap / DAS Customizable guaranteed - Canada
HTC Viveデラックスオーディオストラップ
Caring for your VIVE
Deluxe Audio Strap: How to Remove Headphones
Vive Cosmos Elite uncomfortable head strap easy solution : r/Vive
HTC Vive Deluxe Audio Strap Review
Attaching Vive Deluxe Audio Strap to the headset