Things You'll Need
Dish or laundry detergent
Baking soda, white vinegar or kitty litter
The storage space under the kitchen sink can come in handy, especially in small kitchens. If this area has a moldy smell, it's not only unpleasant to use but unsafe as the smell indicates the presence of mold under your sink. Finding the mold is key to eliminating this dreadful smell. Once the mold is gone, the smell will follow, giving you your storage space back.
Take everything out from under your kitchen sink, inspect it for mold and set it aside.
Search for the mold and its cause: moisture. If you have a leak from your sink or its pipes, call a plumber to fix the problem or the mold will promptly return after cleaning.
Put on gloves, goggles and a face mask to keep you safe from the mold.
Fill your kitchen sink with warm water and a few drops dish or laundry detergent. Scrub away the mold with a sponge soaked in the mixture.
Rinse the area with a clean cloth dampened with water.
Fill your kitchen sink with 2 tbsp. chlorine bleach per quart of warm water. Sponge the mixture onto the recently cleaned area.
Leave the area open to allow fresh air to help it dry.
Place baking soda, white vinegar or kitty litter in a small container under the kitchen sink. Leave it there for 24 hours to absorb lingering smells.
Place everything back under the kitchen sink when the moldy smell is gone.
If you live in a humid area, leave the cabinet doors under your kitchen sink open from time to time to allow for ventilation. A dehumidifier under the sink also can help.