when you're basically asleep, eyes all crossing and not focusing, and you hear the wheel, but you try to ignore it but you cant, and you're too tired to go down stairs... you get a little creative LOL.. ive been known to use a little chap stick or even flavored oils LMAO (they work in a pinch but dont last too long)

but if I hear it before im in bed, I usually use veggie or olive oil. what ever we have on hand