Okay, just so we're clear, we should know the cardinal rules. (This is a preliminary list and is subject to change as new information and situations arise.)

Cardinal sin No. 2: Messing up the laundry system. You do NOT putt a color in the whites, or a light in the darks or bolds, etc.

Cardinal sin No. 1: Eating drippy food over a book.

... *carefully wipes her book off*

ADDENDUM: Cardinal Sin No. 1b: Or over a computer.