Abstract: A device having an opening with an edge, whereby on at least one side region of this edge, at least one cleaning element is located, and a support element for limiting the rotation of the opening about a rotation axis and for absorbing compressive forces is arranged on an opposite further side region, and wherein the opening is arranged in a frame which is tiltably connected to a holder via a joint providing the axis of rotation, so that both the at least one cleaning element and the support element can be rested against the rotor blade.