I'm having trouble with my material getting dirty on our laser cutters, especially card and acrylic, as you all well know hex or even pin/knife beds are very difficult to keep clean and transfer gunk easily! Short of putting a machine aside for just card I was wondering if anyone had tried putting glass or ceramic between the bed and the material. Both would be far easier to keep clean though I can see a few problems with heat transfer, especially with ceramic, but if anyone has any experience with it I'd be interested to know.