How often should I replace the AquaClean water filter?

Replace the AquaClean water filter at least every 3 months, even if the machine has not yet indicated that replacement is required. After 95 liters of water have flowed through the filter, the AquaClean light will turn orange and flash to remind you to replace it. As long as the light is flashing orange, you can replace the filter without descaling the machine first. (Page 15)