[. . . ] Replace the shaving heads every 2 years (type HQ 3 Double Action) for optimal shaving results. [. . . ] - Switch the appliance off, remove the mains plug from the socket and disconnect the appliance plug from the shaver. Every week: shaving unit - Press the release button and take the shaving unit off the shaver (fig. In this case, remember to lubricate the shaving heads with a drop of sewing machine oil after cleaning (fig. - Lubricate the trimmer teeth every six months with a drop of sewing machine oil (fig. [. . . ] In this case, remember to lubricate the shaving heads with a drop of sewing machine oil after cleaning (fig. [. . . ]