The invention relates to a self-cleaning optical housing arrangement comprising a first cylindrical shell, a shaft, a motor, a second cylindrical shell, a cleaning pad, a shaft magnet and a cylinder magnet. The shaft magnet and the cylinder magnet are arranged in order to magnetically interact such that a rotation of the shaft causes the shaft magnet to exert a force on the cylinder magnet causing the second cylindrical shell to rotate with the shaft. The cleaning pad will upon rotation of the shaft and the second cylindrical shell, sweep across and thereby clean at least a part of an outer surface of the first cylindrical shell.