Something I discovered in my younger days as a baby-sitter was that baby wipes will clean just about anything in a pinch. And they are also perfect for removing your makeup on those nights when you're too tired (or lazy) to wash your face before heading for bed.
They also make great brush cleaning wipes, to help keep your makeup brushes cleaner between washings.
(Yes this post is a day early. I'm gonna be too busy to blog tomorrow!)