The shaver heads of your Philips electric shaver shave millions of hairs in 1 year. This ensures inevitable wear and tear on the blades, so you do not get a smooth shave. In addition, a lot of grease and dirt remains in the shaving head. This will foul and damage your skin. Make sure you prevent this by purchasing a new shaver after 1 year. Pay attention to the type numbers, because you know whether the shaving head is suitable for your shaver.