Frequently Asked Questions Why should I replace my Philips shaving heads? Every year, your Philips shaver blades travel the height of Mt. Everest… 49 times! After such a workout, even the best materials can lose their edge. Stay on top Retain your razor's peak performance by replacing the heads once a year. A few points to consider: Philipis shaving heads are made of the highest quality steel as they are in regular contact with your skin. However, even the best materials wear down when used regularly. You may not notice it immediate, but gradually your shaving head will become less sharp. That is why we recommend that you replace your shaving head every 12 months. The ideal replacement frequency depends on how much you shave as well as the thickness of your facial hair.