How do I clean the fabric softener dispenser?

Remove the dispenser from the agitator, separate the dispenser cup from the cover by grasping the top and pushing down inside with your fingers. Soak both parts in a solution of 1 US gallon warm water, 1/4 cup heavy duty liquid detergent, and 1 cup bleach. Loosen any build-up with a soft cloth (not a stiff brush), rinse, reassemble, and place back on the agitator.