system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it that I can go all day (8+ hours) without my skin getting oily but if I fall asleep, even just an hour nap, it is almost instantly grease city?
gpt
Probably because rubbing your face against the pillow is going to get it hot and sweaty, and there will be a build up of dirt on your pillow from previous nights. If you have wax in your hair, you may be rubbing that into your skin too when you lie down.