What's the noun for dustless? Here's the word you're looking for.
dust
(uncountable)Fine, dryparticles of matter found in the air and covering the surface of objects, typically consisting of soil lifted up by the wind, pollen, hair, etc.
(countable) The act of cleaning by dusting.
(obsolete) A single particle of earth or other material.
The earth, as the resting place of the dead.
The earthy remains of bodies once alive; the remains of the human body.