There have been a few very rare occasions when I came home teetering pissed drunk from a club where I just fell into bed and passed out and didn't take off my makeup, and even slept in my eyelashes. It soooo gross though, the next day my eyes were glued shut from the lash glue! Nasty stuff.
But 99% of the time, I remove all my makeup with a washing cleanser and cold water. I can't wash my face with warm water, it needs to be on the cool side. And I always moisturize after, and put on eye cream. I can't go to bed with makeup on, it just feels sooo gross and I feel like I'm spreading a layer of germs and gunk to my bedsheets. But, often I shower at night before bed (not much of a morning shower person) and I just wsh it all off in the shower.