Because of limited time in a morning, when I was my hair, I really need to do so at night. However, I can't get into the shower until after 8pm and because we go to bed early - say 9.15 - 9.30 - my hair's not totally dry when I go to bed. I then wake up with one side of my hair flat, with a wave somewhere above my ear where it was rested against the pillow all night. I look like I've slept against a wall. 
I've been trying to do morning showers instead, on days when I need to wash my hair, but we have to be out by 7.30 and DS makes the most of me being upstairs and "forgets" to put his uniform on until he's nagged to do so. It was chaos this morning and the final straw - I have to find some way of washing my hair at night and waking up without looking like Lady Macbeth.
I have short, ear length, straight hair if that helps.
Any suggestions?