The cartridge is empty.
Replace the cartridge while the washing machine is switched on.
Check whether the laundry is clean. If it is not, there may not have been enough detergent.
Wash the laundry again if necessary.
Remove the cartridge if it is not detected.
Ensure that the two small switches located in the TwinDos compartment on the back of the washing machine are freely movable.
Reinsert the new cartridge.
Acknowledge the displayed question with OK/Yes. This resets the counter for the number of uses back to 0.
If the fault persists, please contact us or book a repair appointment online.