See, Chara can handle a statement like that if it came from Frisk. Technically, it's true--they really needed a wash. If they're cushioned between a whole load of clothes in the laundry machine, they'll be fine. Their dirtiness is something that can be... fixed. Maybe stay fixed. They're obviously not going to come out looking like they're fresh from the store, but they'd be easier to look at. They wait for Frisk to return.