text: What do you mean clean burning? There's no clean burning wax, or... all the good quality waxes are clean burning 🙂 If you mean 'toxins' then research shows there's no difference between waxes, incl. paraffin... all of them emit similar substances at similar levels. If you mean 'soot free'... if a candle is wicked correctly then you normally won't see any soot unless you disturb the air, or there's draught, etc. There are no soot free candles, there are only candles where you can or cannot see soot. Fragrances, essential oils and dyes - they make the composition of any candle way more complex so (and again there's research) so substances they emit are at higher level and potentially more concerning. Anyway, 'clean burning' is just a marketing term, a keyword with so many meanings that it doesn't really mean anything. When I have a moment I'll try to find the link to the research but I'm 100% that the link has been shared in this group quite a few times.