Mold in a Refrigerator: Door Seal, Drip Pan, Water Line and Ice Maker — Where It Hides and How to Clean It (2026)

Cold, Dark, Damp — and Full of Food

A refrigerator is cold enough to slow mold but not to stop it, and it has several places that stay wet in the dark: the folds of the door gasket, the drip pan that catches defrost water under the unit, the water dispenser and its line, the ice bin, the bottom of the crisper drawers. Add a forgotten container of leftovers and the spores have a source. A fridge that was switched off and shut for storage is the extreme case — every surface grows fuzz within weeks.

None of this damages the appliance. It is a cleaning job, with a few rules about what to clean it with.

Where It Lives

Cleaning It

The cleaner: on food-contact surfaces, baking soda in warm water (a few tablespoons per quart) or diluted white vinegar — vinegar handles most of what grows in a fridge and leaves no residue. Bleach is for the gasket and exterior only, and even there rinsed afterwards; bleach residue where food sits, and bleach on some interior plastics and stainless, is the reason to avoid it inside.

1. 1Empty it. Discard anything moldy or past its time (soft foods with visible mold go; hard cheeses and firm produce can be cut a generous inch around the spot, per USDA guidance).
2. 2Shelves and drawers out, washed in the sink with dish soap, rinsed, dried.
3. 3Interior: wipe every surface with the baking-soda solution or vinegar, corners and the drawer tracks included. Rinse with a clean damp cloth.
4. 4Gasket: pull the folds open and wipe each one with vinegar or diluted bleach on a cloth; an old toothbrush for the inner channel. Rinse. A gasket with mold grown *into* the rubber — black that will not wipe off — is replaced; it is also the gasket that no longer seals.
5. 5Drip pan: behind the kick plate at the bottom front, or at the back. Slide it out, empty, wash with hot soapy water and vinegar, dry, refit. Most people have never seen theirs.
6. 6Water dispenser and ice maker: replace the filter (an expired filter feeds the biofilm), flush a gallon through the dispenser, scrub the nozzle with a small brush and vinegar, dump the ice bin and wash it. A slimy or discoloured line is replaced.
7. 7Leave the door open for an hour with an open box of baking soda inside, then restock.

A Fridge That Was Turned Off

Storage mold — a fridge unplugged in a garage, a second fridge shut for a season, a unit that sat after a move — covers every surface. The method is the full clean-out above, everything removable washed in the sink, the interior and gasket scrubbed, the drip pan cleaned, and the door propped open for a full day to dry before it is plugged in. Then baking soda inside for a week. The rule for next time is simple: a stored fridge is stored with its door propped open.

A fridge that sat closed with food in it after a long power outage is in the same category, with a worse smell; activated charcoal or coffee grounds in a bowl inside for a few days after cleaning take the last of it.

Keeping It Out

• Wipe the gasket monthly — thirty seconds with a damp cloth.
• Clean the drip pan twice a year.
• Replace the water filter on the schedule the fridge asks for, and flush after.
• Dump the ice bin monthly; it never dries otherwise.
• Wipe spills in the crisper when they happen; produce residue is the food.
• Check the seal: a gasket that does not hold a slip of paper firmly is letting warm, humid air in — condensation inside is the result, and a new gasket is cheap.

Is It Safe to Keep Using?

Yes, once cleaned. The mold itself does not harm the appliance, and a cleaned fridge is a clean fridge. The genuine exposure was the moldy food and the spores it shed onto other food, and the fix for that is the clean-out and the habit. Anyone with a mold allergy or a weakened immune system should let someone else do the scrubbing.

Bottom Line

Gasket, drip pan, water line, ice bin, crisper — that is where fridge mold hides. Baking soda or vinegar inside, diluted bleach on the seal only, everything removable washed in the sink, and the door propped open to dry. Replace a gasket the mold has grown into, replace the filter on schedule, and store a fridge with the door open. It is an hour, and it is not a reason to buy a new refrigerator.