I've had my DT880s for more than two years now and I just changed the velour pads. The old ones were deflated and oily. The new ones are stiff and clean. Not only are they more comfortable, they sound better too!! I can now hear more soundstage, better dynamics and stronger bass. This is chiefly due to the increased distance between the driver and my ears. Moral of the story? Don't live with deflated and oily pads! Change them after a year.