Dear Co-Worker:

When you made the pot of coffee this morning, you neglected to dump the old coffee from yesterday out of the carafe first.  If I wanted to drink a sludgy mixture of yesterday’s coffee with some fresh brewed stuff, I would.  However, I do not want.  As we are all over the age of 4, and you’ve somehow managed to make a pot of coffee (Congratulations!), please don’t do a half-assed job of it.  You will ruin my day.

Thank you,
~C