Second Exercise
Soon after eating, everyone was shown to two large bathhouses divided between males and females. Even though their Synthetic High Durability Suits were dust resistant and adapted to the temperature of the students, making it hard for them to sweat, it doesn't make them incapable of sweating at all. Not to mention, the wilderness was filled with various smells, granted, the Concealment powder made them smell a lot less.
In the end, the students just wanted to feel clean, so they took showers. It was also at that point that Ellie told Osho he didn't need to give Gale a bath so often, both because it wasn't necessary and birds, especially birds capable of using Mana, could clean themselves easily.
So, to the delight of the bird, it didn't have to bathe again.