6O's eyebrows draw together in puzzlement. Given A2's history with machines (or what 6O knows of it, anyway), the statement about 'thanks to a machine' simply has her assuming A2 took the oil filter from a machine's carcass. No, it's the statement about not needing clothes that's weird.

But the humans gave them to us! These clothes help muffle sound, and they'll protect your skin from further damage!