According to instructions supplied with the units, the shaving heads need cleaning every 2 months and replacing every 18 months. However, not all Philips spare parts will fit well on all Philips shavers. I chose the Philips SatinShave Prestige shaver as the best electric razor for women for its useful … Most require cleaning cartridges… Continue reading 15 Best Beard Trimmers for Men 2023: Keep Your Scruff Shaped Up Like a Pro