Why is mold growing in my fridge?

Author: Prof. Francisco Zemlak  |  Last update: Sunday, June 14, 2026

Getting rid of old or expired food makes space for new groceries and helps prevent mold growth. Mold thrives on decomposing matter, and old food fits the bill perfectly. So, say goodbye to that half-eaten takeout container from two weeks ago and those expired yogurt cups hiding in the back of the fridge.

How do I stop mold from growing in my refrigerator?

Cleaning: If your fridge isn't cleaned regularly, spills and residues can harbor mold. Clean your fridge regularly with a solution of vinegar and water to help prevent mold growth. To avoid mold, regularly check your food, maintain proper fridge conditions, and clean your appliance frequently.

Is it safe to use a refrigerator with mold?

Any type of mold in your fridge is a problem (whether it's black mold or a different type), as it could cause allergic reactions for you or the people in your household. Reactions could include things like sinus congestion, coughing, asthma-like symptoms, irritated eyes, rashes, and more.

Why does mold grow so fast in my fridge?

Rotting food is the most common source of refrigerator mould, but can occur even if you have a crystal clean fridge. Mould only needs moisture, air, a warm fridge temperature (above 4°C) and varying humidity levels to develop. A damp, dark environment is what mould loves the most, and fridges are dark most of the time!

How do you get rid of mold in the inside of a refrigerator?

How to Clean a Moldy Fridge: A Step-by-Step Guide
  1. Remove Shelves and Drawers. Start by removing all your shelves and removable drawers if your refrigerator has them. ...
  2. Apply Vinegar. ...
  3. Let Vinegar Take Effect. ...
  4. Spray Inside the Fridge. ...
  5. Scrub and Wipe. ...
  6. Dry All Surfaces. ...
  7. Dispose of Paper Towels and Wash Cloths.

MILDEW / MOLD Refrigerator Issues / Help Needed Part 1

Can mold grow in a cold refrigerator?

General Cold Room information

Refrigerators and walk-in cold rooms are ideal environments for mold to grow due to high moisture/humidity levels, and abundant food sources such as paper, cardboard, cell culture media, etc.

What does black mold look like?

Black mold is a type of fungus that looks dark green or black. There are many kinds of black mold, but when most people refer to it, they're referring to Stachybotrys chartarum (S. chartarum). It grows and spreads on materials that contain a lot of cellulose, including paper products, wood products and drywall.

How to store a fridge so it doesn't mold?

How to Store a Refrigerator in Storage
  1. Step 1: Switch off refrigerator the night before you plan on storing it.
  2. Step 2: Clean and disinfect every surface, inside and out.
  3. Step 3: Ensure the refrigerator is completely dry.
  4. Step 4: Move the refrigerator carefully.
  5. Step 5: Keep the refrigerator upright at all times.

What temperature should a fridge be?

For the fridge compartment, we recommend maintaining a temperature between 3°C to 5°C to slow bacterial growth and preserve perishable items effectively. Similarly, for the freezer compartment, it is best to set the temperature at -18°C or lower to freeze food solid and maintain its quality over longer periods.

Should I put baking soda in my fridge?

Using baking soda as a cleaning agent or as a deodorizer can help your refrigerator stay clean and fresh.

Why do I have black mold in my refrigerator?

The steady moisture, loosely sealed leftovers, minimal air movement, and persistent darkness can make the inside of your fridge the perfect multiplying ground for black mold.

Does sugar prevent mold growth?

Molds and bacteria cannot survive on very sugary foods, she said, because the concentrated sugar, like salt, has the effect of drawing moisture out of cells. “We talk about a food's water activity, how much of its water is available,” Dr. Hodge said. “Sugar, honey, molasses and maple syrup have very low water activity.

What kind of vinegar kills mold?

Cleaning vinegar, which contains 6% acetic acid, is the best type for killing mold. White vinegar containing 5% acidity will also work just fine. If you don't already have some at home, white vinegar can be inexpensively purchased at most grocery stores.

What temperature should a refrigerator be to prevent mold?

This also applies to items such as leftovers, "doggie bags," and take-out foods. Also, when putting food away, don't crowd the refrigerator or freezer so tightly that air can't circulate. Keep your appliances at the proper temperatures. Keep the refrigerator temperature at or below 40° F (4° C).

Does baking soda in the fridge prevent mold?

Baking soda will create an environment that is too acidic for mold to grow, while vinegar will add more acidity. Use a diluted solution of bleach to clean your fridge.

Will mold grow in an unplugged fridge?

An unplugged, turned off fridge is the perfect breeding ground for mould.

Should a fridge be on 1 or 5?

To keep food cold and fresh but not frozen, it should be set somewhere between 3-5°C (37-40°F). Some fridges have a temperature reading, but most have a numbered dial. This usually goes from 1 to 5, with 5 being the coldest.

Why is my fridge wet inside?

Humidity is generally caused as warm, humid air enters from outside every time you open the door. As the air cools, it dumps more water inside your fridge. Always close the fridge door as quickly as possible after opening it. Leaving the door open allows warm air to enter and increases the possibility of condensation.

Is 37 degrees too cold for a refrigerator?

The ideal refrigerator temperature is 40 degrees Fahrenheit or below in the main part of the fridge. The optimal temperature for keeping foods cold is 37 degrees Fahrenheit. If you're wondering what temperature should a refrigerator be, put a thermometer inside your fridge.

Can a moldy fridge be saved?

Yes. For small mold patches, you can safely remove them using a solution of vinegar and water or baking soda. Empty the fridge, scrub all surfaces, and dry thoroughly.

Why does food in my fridge keep molding?

Molds often grow on produce, baked goods, leftovers and dairy products. Mold spores will travel from one food item to another and can live on surfaces in the Refrigerator. Mold needs moisture, air, and prefers warm temperatures. Foods which are kept past the recommended storage times are receptive to mold.

What are signs of mold sickness?

Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
  • Nasal and sinus congestion.
  • Eye irritation, such as itchy, red, watery eyes.
  • Wheezing and difficulty breathing.
  • Cough.
  • Throat irritation.
  • Skin irritation, such as a rash.
  • Headache.

What can be mistaken for mold?

Many confuse mold and mildew, which is not surprising — they have more than a few things in common: Both are types of fungi that no homeowner likes to see in his or her home. Both are keen on forming in moist, warm areas.

Is it safe to clean black mold yourself?

Thus, exposure to the toxicity of black mold can cause harm to our physical health. Cleaning it yourself risks a greatly increased chance of acquiring damaging health conditions by unsettling the toxins into the air. Depending on the frequency of mold exposure, an individual's health can be severely compromised.

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