If the options were fall asleep in the tub, or go to bed with manky hair, Arthur figured catnaps were the lesser of two evils. He set to work, washing and rinsing, and the repeated the process--ignoring the ring of grime he got on his arms whenever he dipped them into the tub, and the spots of dirty water on his under-shirt. Undershirts were disposable.
When he finished, he kissed Eames' freshly washed cheek to wake him up.