Slimy black mold can grow inside your dishwasher due to the appliance's regular heat, moisture and lack of sunlight. This mold, strains of the genus Exophiala, can withstand the high temperatures and detergent agents in dishwashers. Generally, the mold grows when bits of food get stuck in the holes of the filter screen at the bottom of the dishwasher or in crevices such as those of the door gasket. Running normal dishwasher cycles won't clear away the black mold, so you must get aggressive when it comes to cleaning it out. While the problem and the solution are the same with essentially any late-generation automatic dishwasher, the steps for removing the filter on the Samsung are not necessarily the same as those for other brands.
Remove all dishes from your Samsung dishwasher and remove both the upper and lower dishwasher racks.
Mix 1 cup of bleach with a gallon of water in a cleaning bucket. Protect your hands with rubber kitchen gloves.
Wet the sponge in the bleach water, then scrub the walls of the dishwasher. Spend extra time on any areas that show the slimy black mold. Scrub the rubber seal around the Samsung dishwasher door, where Exophiala tend to live.
Take apart the filter from the bottom of the dishwasher by following the manufacturer's instruction. Find the release tab on the washer arms and press it to remove the arms. Lift up the filter screen.
Scrub the filter screen thoroughly, using the wet scrubbing sponge. If the black slime appears in the small holes of the screen, try soaking the entire screen in the bleach water for about 15 minutes.
Wipe away any clumps of black slime that have fallen to the bottom of the dishwasher using the cleaning cloth. You don't want them pulled into the filter or pump unit.
Reassemble the filter screen according to the Samsung dishwasher owner's manual, then replace the dishwasher racks. Pour the bleach water into the bottom of the dishwasher, then run a single cycle on empty. This will help get rid of any mold in the dishwasher hose.