VEVOR Water Distiller, 1.1 Gal Distilled Water Machine, 750W Pure Water Distilling w/BPA Free Plastic Container, Water Distillation Kit w/Button, Countertop Distilled Water Maker for Home, White

https://a.co/d/0iApNonU I use a CPAP and I end up with the scaling at the bottom if I use anything other than distilled water same is true for humidifiers if you want to eliminate the residue the best thing you can do is use a distilled water above I dropped a link for the cheapest one I could find on Amazon

I'm in the US, so I'm not sure that Amazon sells them in the UK , but I just bought a distilling machine. There are lots of models. https://a.co/d/07nAOzvx

https://amzn.to/4bBoHhs