339. Maintenance and cleaning9.1 Function testRegularly check the technical safety of the product, e.g. check the housing for damage.If safe operation is no longer possible, cease operating the product and safeguard it againstaccidental operation.Safe operation is no longer possible in the following circumstances: The device shows visible damage. The device no longer works correctly. The device has been stored in adverse conditions for a long period of time. The device has been subjected to stress during transportation.Please note:This product is maintenance-free for you. There are no components to service oranything inside the product to check. Never open it.9.2 CleaningClean the device with a clean, dry cloth. The cloth can be dampened with lukewarm water if it getsdirty.Ensure that liquid does not penetrate the device, as this will cause damage. Do not useany chemical cleaning products, as they could damage the surface of the housing.10. DisposalDevices displaying this symbol may not be disposed of as domestic waste. At theend of its service life, dispose of the product according to the applicable legalrequirements.Please contact your dealer or dispose of the products at the local collection pointfor electronic waste.