Just clean with acetone. However, stitches are really weak and shoes will tear apart in a few month. They were mostly white on the footbed! I wouldnt use these for all day use I ordered two pairs in different sizes. Je crois quil donne entièrement et de façon juste ce que lartiste veut nous faire entendre. The ear cups are very adequate size and provide a very good listening experience. I am normally a 7 and I did take the tip to size down so I got a 6. Not oily at all! I misplaced the older one.