How do I add rinse aid to my Maytag W10157789A dishwasher?

To add rinse aid, turn the dispenser cap counterclockwise and lift it off, then pour rinse aid into the opening until the indicator window looks full. Replace the dispenser cap and turn it clockwise, making sure the cap is fully locked. Add rinse aid when the indicator drops to the 'Refill' level. (Page 4)