1. For Hard Surface - dampen a small cloth with rubbing alcohol or hand sanitizer and gently wipe down the exterior of the ear pads. Then soak a cotton bud in alcohol/ hand sanitizer and use it to clean the nooks and crevices.
2. For Leather Earpads - wipe them down with a small cloth dampened with some soap and warm water. Wipe dry with some paper towels and leave to air dry completely.