Cleaning the Senseo machine

Cleaning the Senseo machine can be done with tablets you can buy in the shop where they've sold you the machine.
They're quiet expensive.

Do you know lemonjuice works as well?

Put about 5 ml of lemon juice in the watercan.
Heat the water and pour 1 cuppa.

Repeat this after about half an hour.

Then clean the machine from the lemonjuice with making two cuppa's with clean water.