Washer-dryer combo has a persistent musty or moldy odor inside the drum.

Safety first: Use cleaning agents according to manufacturer instructions and ensure good ventilation.

Steps to eliminate odor:

• Clean gasket: Wipe the door boot gasket thoroughly with a cloth and a mild bleach solution or washer cleaner, paying attention to folds where water collects.
• Run tub clean cycle: Use the built-in drum clean/tub clean cycle with a Samsung-approved cleaner or white vinegar (per manual).
• Leave door open: After each use, leave the door and detergent drawer slightly open to allow the interior to dry.
• Check drain filter: Clean the drain pump filter to remove trapped debris that can cause odors.

When to stop: If odor persists after multiple clean cycles, there may be hidden buildup in hoses or the outer tub; deeper cleaning by a technician may be required.