Hand Dryers aren't going away if the rise and fall of an interplanetary empire happened while they're still going strong. This species of restroom machine was redesigned to wash hands and kidnap bacteria, which aren't rare in ecumenopolitan ruins. Wild hand dryers are actually a bit of a pest themselves since they breed on their own and potentially steal knick-knacks from settlements. They are otherwise harmless on their own, and basically free grade-a+ nanotechne because of this.