Thse insights have been pulled from the individual experiences of astronauts and cosmonauts recorded in published first person accounts — journals, diaries, debriefs, and post-flight reflections.As this database includes the personal, subjective experiences from a diversity of flyers, they may sometimes contradict, but together they provide a more holistic, if messy, picture of life in space. To learn more about how these categories were developed, please see this related publication.
Given the lack of running water, the crew has had to 'improvise' elements of hygiene - using wet wipes and towels, needing to swallow toothpaste after brushing, wearing a water bag over your head to wash hair.
Water is a valuable resource, and so wet things are left out to air dry. A water conduction collection unit then removes moisture out of the air to purify and recycle. The crew jokes that they're all very close, given they drink each others' sweat.