How do I check and refill the rinse agent dispenser?

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. To refill, fill the dispenser until it reaches the bottom of the lip inside the opening and replace the cap. A full dispenser should last about one month, and if rinse agent spills, wipe up the excess immediately. (Page 6)