Truma Combi 6e Descaling?

Our Kingham has a Truma Combi 6e boiler.

We have had it serviced every year but I have just noticed this in the Truma manual:

"The device must be descaled on a regular basis (at least twice a year).

We recommend the Truma system care set for cleaning, disinfecting and looking after the boiler. Other products – in particular products containing chlorine – are unsuitable."



The Autosleeper Kingham Manual mentions that "limescale must be removed by using chemicals" but gives no advice as to what you should use



I have tried Googling "Truma System Care Set" and cant find anything anywhere.



Just wondered whether others with this model boiler descale on a regular basis and if so what do you use?

Ahh thanks Peter. Without realising it de-scales as well as cleans, I have been using Elsan Freshwater Tank Cleaner regularly... phew can tick that off the list