We recommend replacing the cleaning cartridge from your Philips SmartClean system when the arrow symbol on your device flashes orange or when you are no longer satisfied with its performance.
When used weekly, the cartridge should last around three months. When used daily, the cartridge should last around one month.
If you see the orange replacement icon flashing on your SmartClean station but there is still some fluid left inside the cartridge, please still replace it. This level of fluid is insufficient for the SmartClean to perform effectively.