[. . . ] To fully benefit from the support that Philips offers, register your product at www. The Super Lift & Cut system ensures a close and easy shave every day. [. . . ] After cleaning, lubricate the central point on the inside of the guards with a drop of sewing machine oil to prevent wear of the shaving heads. Trimmer (all types except hQ6920) Clean the trimmer every time you have used it. Tip: Lubricate the trimmer teeth with a drop of sewing machine oil every six months (Fig. Replacement Replace the shaving heads every two years for optimal shaving results. Accessories The following accessories are available: - HQ55 Philips Shaving Heads. Environment - Do not throw away the appliance with the normal household waste at the end of its life, but hand it in at an official collection point for recycling. Always remove the battery before you discard and hand in the appliance at an official collection point. dispose of the battery at an official collection point for batteries. If you have trouble removing the battery, you can also take the appliance to a Philips service centre. The staff of this centre will remove the battery for you and will dispose of it in an environmentally safe way. Compliance with standards This Philips appliance complies with all standards regarding electromagnetic fields (EMF). If handled properly and according to the instructions in this user manual, the appliance is safe to use based on scientific evidence available today. [. . . ] You have not cleaned the shaver well enough or you have not cleaned it for a long time. see chapter `Cleaning and maintenance' , section `Every two months: shaving heads'. [. . . ]