Pookie this isn't our world, so whatever Bernadette Banner said most likely won't apply to this story. Besides, I've been near people with extremely breathable clothes in a cool and dry environment and and still fucking stink, and this is them already having bathed that morning;
From the way the webtoon described their hatred for water, they sure as hell ain't going anywhere near it lmao, so I don't think they'd even wipe themselves- plus they never showed it in the webtoon so I assume the people from this world just living out there thinking as long as they wear new clothes it's fine... and even if they did, it probably would have been after weeks at a time.
You also have to consider the cologne and perfumes they used, as well as the very odd medicine.
So just imagine the stink ☠ jeez
Hmmm... They actually weren't stinky tho? Like sure they couldn't bathe but they still wiped how their bodies and their clothes were actually really breathable , because you have to consider that they didn't have plastic mixed in their clothes or making their clothes, and like cotton and stuff , it was extremely breathable and their clothes, at least around their arms and stuff wasn't so tight. Bernadette Banner made a video about it on YouTube. Maybe check it out, idk