How do I use and refill the rinse agent dispenser?

Fill the rinse agent dispenser until it reaches the bottom of the lip inside the opening, then replace the cap. To check if rinse agent is needed, press the clear center of the fill cap 2 or 3 times — if rinse agent fills the center of the cap, you have enough. A full dispenser should last about one month, and if rinse agent spills, wipe up the excess immediately. (Page 6)