Press up on the recessed latch in the dishwasher door at the top to open the door then lower it.
Slide out the bottom rack on its wheels.
Twist the drain grate 1/4-turn counterclockwise to unlock it from the bottom of the appliance. The grate has a series of strainer holes in circular rows. Lift the part straight up to prevent spilling any old food caught in the grate.
Pull out the filter cylinder beneath the grate.
Wash the two filter parts in the sink under hot water, using a nylon scrub brush to remove any stuck-on particles.
Reinstall the filter cylinder and place the grate on top, twisting the upper part 1/4-turn clockwise to lock it in place.
Close the appliance door and press the latch.