Astronaut Victor Glover demonstrated after an exercise session, revealing that the space "shower" basically involves using a wet towel to clean the body. In the vacuum of space, a traditional water shower is physically unfeasible; due to the lack of gravity, the drops would not fall but instead disperse erratically throughout the cabin. This poses a critical danger to the spacecraft's electronic systems, as any stray liquid particle could cause short circuits or serious technical failures.
Given this scarcity and the physical conditions, daily hygiene is carried out using a technique called "dry cleaning". As detailed by the European Space Agency (ESA), astronauts use special soaps and shampoos that do not require rinsing. These products are applied to the skin and hair and then simply removed with a cloth or sponge, effectively eliminating sweat and dirt without the need for a constant water flow.
Water management is the most complex logistical challenge. On the International Space Station (ISS), water is recycled from air humidity and urine. In the Orion capsule, severe space and resource limitations require cleaning to strictly adhere to wipes and rinse-free soaps. Despite these restrictions, these protocols ensure that the crew maintains their health and well-being during their historic journey to the Moon.