A neat idea for the CNC, have a look at the Dremel 490 Dust Blower. See the video review https://www.youtube.com/watch?v=8NzWY0eaUiw The blower attaches to the spindle and blows away the dust/residue from the cutting as it happens.
Maybe one of talented users could design one for the CNC or possibly this is a future addition by Snapmaker.