I have never descaled my machine which will be 3 years old next April but was descaling our Dualit kettle with their recommended descaler which is Kilrock Multi purpose Descaler and noticed on the label on the back it mentions using on Coffee Machines, anyone here used it or will it be a bit harsh, it sure ‘Fizzes’ well in the kettle but does a great job, I was only asking because it is what I have in the cupboard and will buy whatever is needed for the ‘job’, thanks