The argon bath

Earlier I'd noted dust-repelling surfaces. I wondered if that was possible or always desirable, to make all surfaces dust-repellant. Today we have the excellent news that liquid-nitrogen might wash it all away.

One problem is that nitrogen isn't common where is also regolith. Earth would have to ship canisters to the Moon and to near-Earth asteroids. Maybe Venus could ship it too but they'd be short on canisters and, of course, further down the Solar well. Out where nitrogen is common again, like around Saturn, there's no regolith to worry about.

The nitrogen is presumably compressed from the air that's already been shipped to the station, which structure is sealed, so the gas shouldn't be lost for reuse. Mars cares less about this on account they can just pull more nitrogen from the (admittedly thin) atmosphere.

Mars might be best of all the dusty worlds: half the atmosphere happens to be argon, which goes liquid at a higher-temperature than nitrogen. This means if the Martians (somehow) cool a chamber to about 85 K it should become a literal bath-room of argon in a nitrogen atmosphere. I am unsure how good argon is as a solvent; as documented here, it dissolves better than nitrogen in oils. But with regolith and Martian dust I don't hear anyone calling for solvents, just something reasonably-inert as will wash suits.

Another point-of-interest is that this 85 K bathroom's atmo, in Mars, defaults to 2:1 nitrox. 33% oxygen seems uncomfortably flammable - but is eminently breathable; so, maybe can be allowed to be lower-pressure, saving costs. I'd advise some warming-apparatus before ingesting this air into lungs. Also if the Martians have been breathing natural argox in their suits then they're getting the ol' Grecian Bends herein, which isn't a joke where sequestered from the rest of the habitat. Suits can be loaded up with pure nitrox for the outdoors, so they get The Bends out of the way before they even start.