How do I perform maintenance on my WM3555HWA, such as cleaning the detergent dispenser and running a Tub Clean cycle?

To clean the detergent dispenser, remove the drawer, rinse it under warm water, and let it dry completely before reinserting it. To run a Tub Clean cycle, select the 'Tub Clean' cycle from the control panel and press 'Start/Pause' to clean the drum and remove any detergent residue.