There are a few simple things you can do to maintain your headphones.
To prolong the life of your ear cushions, gently pat the cushions with a soft cloth after extensive use. This will remove any oils or perspiration that may remain on the cushions
Be sure the earcup ports are clear of lint, dust and debris. Do not allow moisture to get inside the earcups
Periodically wipe the headphones with a damp cloth
To maintain silver headphones, wash the exterior using a soft cloth slightly dampened with a mixture of dish detergent and water