[. . . ] Our products are designed to meet the highest standards of quality, functionality and design. [. . . ] â· To ensure optimum shaving performance, we recommend to replace the shaver foil and cutter block every 18 months, or when the parts are worn. Press the release button, take off the triple shaving frame and gently tap it out on a flat surface. â· Then thoroughly clean the duo cutter block with the brush as well as the inner area of the pivoting head. â· About every four weeks, clean the duo cutter block with Braun cleaning agents. 2 Changing the shaving parts The shaver foil and cutter block are precision parts that, in time, are subject to wear. F/C505, available at your dealer or Braun Service Centres) * (Overall evaluation from Braun users comparing their shave with new parts and those used for 18 months. This product conforms to the EMC-Requirements as laid down by the Council Directive 89/336/EEC and to the Low Voltage Regulation (73/23 EEC). Within the guarantee period we will eliminate, free of charge, any defects in the appliance resulting from faults in materials or workmanship, either by repairing or replacing the complete appliance as we may choose. [. . . ] Off on trimmer head lock trimmer head lock On trimmer head lock trimmer head lock On trimmer head lock trimmer head lock Off on trimmer head lock trimmer head lock Off on trimmer head lock trimmer head lock [. . . ]