Just use a clean, dry cloth. For more stubborn dirt, try dampening a little corner of the cloth and rub.
Hi, have been using an Hdj-500-W for many gigs and I have noticed how filthy they have become. You can literally see the filth on the ear-pads. What is the best way to get them clean and white again? Also, I have already ordered a pair of HDJ-1500-W, so the same goes for that model as well.