The blanket problem doesn't seem to be of any concern to Robin; there are a variety of soaps and things in labeled bottles in a small box next to the tub, and he's busy sifting through them to find something to use on Phalanx.

He brings up a bar of soap and a washcloth, pausing only to roll up his (fairly expensive) sleeves before lathering them together.

"Ever had someone give you a bath before?" He asks this in an off-handed way, though he hopes that jarring a memory or two might remind the strange collection of spirits what a bath is and how it normally goes.