DeLonghi Nespresso Lattissima One Descaling

Check the orange descaling light before making coffee.

Turn the machine so you can reach the water tank at the back.

Lift the water tank away from the machine and remove its lid.

Use scissors to cut the corner off the Nespresso descaler pouch.

Pour the descaling liquid into the water tank.

Fill the tank with fresh water up to the descaling mark, which is about halfway up the side.

Reinstall the water tank lid.

Pull the descaling pipe out of its rear clip.

Remove the bottom tray and the milk container from the front of the machine.

Push the descaling pipe into the milk function opening with the pipe pointing down.

Gently push the filled water tank into the back of the machine.

Place a jug that holds about 1 litre under the coffee outlet and the descaling pipe.

Press the bottom Espresso button.

Watch for the two lower lights to flash and stay lit.

After a few seconds, only the bottom Espresso button should remain lit.

Keep the jug in place as descaling liquid flows from the coffee outlet and the milk function outlet.

Leave the machine running while the bottom Espresso button flashes.

Let the descaling liquid flow through the coffee outlet and milk function outlet until the tank is nearly empty and the jug is nearly full.

The cycle is complete when the flow stops and only the middle light remains on.

Empty the jug into the sink.

Remove the cassette unit that collected water during descaling.

Empty the water from the cassette unit into the sink.

Reinstall the cassette unit before the rinse cycle.

Remove the water tank and lid again.

Pour any remaining descaling solution from the bottom of the tank into the sink.

Fill the tank to the max mark with fresh water.

Reinstall the lid and push the water tank back into the machine.

Keep the 1 litre jug under the coffee outlet and the descaling pipe.

Press the middle Lungo button to start the fresh water flush.

Let fresh water flush through the machine for about 5 minutes.

Let the rinse run until all the lights go off.

Confirm the jug is full and the water tank is empty.

Empty the jug into the sink.

Remove the descaling pipe from the front of the machine.

Remove the cassette unit, empty its water into the sink, and dry it.

Use a clean cloth to dry any area where water has collected.

Reinstall the cassette unit.

Dry the descaling pipe.

Fill the water tank with fresh water up to the max mark.

Reinstall the tank lid and water tank.

Turn the machine back to its normal position.

Reinstall the bottom tray, milk container, and any front parts you removed.

Check that the descaling light is off before making coffee.

Make coffee normally.