While our headphones shouldn’t require any regular maintenance, you can use the following materials for cleaning:
A dish with soap and warm water (detergent will work just fine)
A soft cloth
A small towel
Wet the soft cloth in soap and water. Don't soak the cloth; instead, get it a little damp Gently wipe down the headphone pads with the damp cloth.
For the more stubborn debris and residue, use a dry toothbrush to loosen it up and then wipe it down with the cloth. Afterwards, let it sit on the towel to air dry. Once it's dry, you can safely resume use.