228. Servicing and cleaning8.1 Function testCheck the technical safety of the product such as damage at regular intervals.When it can be assumed that the safe operation is no longer possible, the product must be put outof service and precautions taken to ensure that it is not used unintentionally.It must be assumed that safe operation is not longer possible if the device shows visible signs of damage the device no longer operates and has been stored for longer periods under unfavorable conditions or has been subjected to considerable stress in transit.Please note:The product is absolutely maintenance-free for you. There are no components on theinside of the product to be checked or services by you, never open it.8.2 CleaningMake sure that no liquids can enter the equipment as the device can be destroyed.Never use chemical detergents as they could attack the surface of the device.9. DisposalProducts which are labeled with this pictogram may not be disposed in thedomestic rubbish. Please dispose the product in accordance with the prevailinglegal regulations at the end of its life time. Please consult your dealer or disposethe product over the municipal gathering point for electric scarp.