I don't like to think incase it is something nasty. I will try to find out though.
https://www.bioethanol-fireplace.co.uk/ceramic-fibre-cotton---what-is-it-_6601.html
Hmm...
Sorry I didn't get back on this. I couldn't work out the concern, guessing ceramic fibre is bad to be around/ burn this way?
@pdlouche started
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I don't like to think incase it is something nasty. I will try to find out though.