Descaling the bottle steriliser

[Babasaclover]

So how do you go about this? Not sure about using chemicals in it like you would a kettle. How do you al do it?

Did it come with any sachets of citric acid?

I bought it in little tub from the home brewing section in wilko for about £1.
You just put some in with water and switch it on. Once finished, rinse out then run a couple of cycles of water only.

We have a Tommie tippee machine and they recommend vinegar.