Gravity. The clothes falling down from the upper half is described on the slides, so I assume the rotation isn't fast enough for the clothes to stick to the wa

Gravity. The clothes falling down from the upper half is described on the slides, so I assume the rotation isn't fast enough for the clothes to stick to the walls, or it has an elliptical rotor to make sure there a speed difference ? (edited as I'm not sure how it exactly works)