Contain the area before you touch anything

The key to stopping spore spread is to keep mold wet and still while you work. Dry mold releases spores into the air; wet mold stays put. Before you clean, close the door to the room, turn off any ceiling fans or air conditioning units that pull air through the space, and open a window if the room has one. If you do not have a window, you will need to open the door only to bring in supplies and remove waste.

Spray the moldy surface with water from a spray bottle until it is visibly wet. Use plain water or a mixture of water and white vinegar (equal parts). Do not use a dry brush or cloth—this kicks spores into the air. Let the water sit for a few minutes so the mold absorbs it and becomes less likely to release spores when you touch it.

Key Takeaways

  • Wet mold before cleaning to prevent spores from becoming airborne; dry mold releases spores easily.
  • Wear an N95 or KN95 mask, disposable gloves, and eye protection to avoid breathing or touching spores.
  • Use a spray bottle with water or vinegar solution, not a pressure washer or dry scrubbing, which spreads spores.
  • Bag all contaminated materials and dispose of them as regular trash; do not leave them in the home.
  • If mold covers an area larger than 10 square feet, call a professional mold remover instead of cleaning it yourself.

Wear the right protective gear

An N95 or KN95 mask is the most important piece of equipment. These masks filter spores out of the air you breathe. Surgical masks and cloth masks do not work—they are designed to stop large droplets, not tiny spores. Fit the mask snugly over your nose and mouth so air does not leak around the edges. If you have a beard or facial hair, the mask will not seal properly, and you should shave or trim before cleaning.

Wear disposable gloves (latex, nitrile, or vinyl) to keep spores off your skin. Wear eye protection—safety glasses or a face shield—because spores can irritate your eyes. If you have long hair, tie it back so it does not brush against moldy surfaces. Wear clothes you do not mind throwing away or that you will wash separately in hot water after you finish.

Clean with water and a cloth, not a brush or pressure washer

Spray the moldy area again to keep it wet. Use a cloth, sponge, or soft-bristled brush to wipe away the mold. Work slowly and deliberately. Do not scrub hard or use a stiff brush—aggressive scrubbing breaks mold apart and releases more spores. Wring out your cloth frequently in a bucket of water so you are not spreading mold from one spot to another.

Never use a pressure washer, shop vacuum, or air compressor on mold. These tools blow spores around the room and into other parts of your home through air ducts. After you have wiped away the visible mold, spray the area again with water and vinegar solution or a commercial mold cleaner, then wipe it dry with a clean cloth.

Dispose of contaminated materials safely

Place all cloths, sponges, gloves, and the mask you wore into a heavy-duty garbage bag. Seal the bag and put it in your regular trash. Do not leave contaminated materials sitting in the home or in a garage—they can continue to release spores. If you had to remove drywall, insulation, or carpet because of mold, bag those materials separately and dispose of them as regular trash unless your local waste service has specific rules for mold-contaminated items.

Wash your hands and any exposed skin with soap and water after you finish. If you wore clothes during the cleaning, wash them separately in hot water and dry them on high heat. Do not shake out contaminated clothes in the bedroom or living room.

When to call a professional instead

If the moldy area is larger than 10 square feet (roughly a 3-by-3-foot square), the U.S. Environmental Protection Agency recommends hiring a professional mold remover. Large areas are harder to contain, and spores are more likely to spread to other rooms. If mold is inside your walls, in your HVAC ducts, or in your insulation, you also need a professional—these areas require specialized equipment and techniques that a homeowner cannot safely do alone.

If you have asthma, a weakened immune system, or a mold allergy, do not clean mold yourself even if the area is small. Mold exposure can trigger serious respiratory problems in people with these conditions. Call a professional and leave the home while they work.

Prevent mold from coming back

After you have cleaned the mold, fix whatever caused it to grow in the first place. If the mold was caused by a leak, repair the leak. If it was caused by high humidity or poor ventilation, run a dehumidifier or exhaust fan. Mold needs moisture to survive, so keeping surfaces dry is the best long-term prevention.

Check the cleaned area regularly for the first few weeks. If mold returns quickly, there is likely a moisture problem you have not found yet. A professional can help identify hidden leaks or ventilation issues that are feeding the mold.

Frequently Asked Questions

Can I use bleach to kill mold?

Bleach kills mold on non-porous surfaces like tile and glass, but it does not penetrate porous materials like drywall or wood, so the mold roots survive and regrow. Vinegar or commercial mold cleaners work better on porous surfaces. If you use bleach, mix one cup of bleach with one gallon of water, spray it on, let it sit for 10 minutes, and wipe it away. Always wear gloves and eye protection.

What if the mold is on fabric or carpet?

Mold in carpet or upholstered furniture usually cannot be fully removed—the spores are embedded too deep. The safest option is to discard the item. If the item is valuable and the mold is only on the surface, you can try spraying it with vinegar solution and letting it dry completely in sunlight, but this rarely works. Professional restoration companies can sometimes save fabric, but it is expensive.

Do I need to open windows while I clean?

Opening a window helps, but it is not required if you keep the door closed and the mold wet. A window lets spores escape outside instead of staying in the room. If you do open a window, make sure air is flowing out, not in. On humid days, opening a window can actually bring moisture in and make the problem worse.

How long after cleaning is it safe to re-enter the room?

Once the area is dry and you have removed all contaminated materials, the room is safe to re-enter. This usually takes a few hours. If you used a strong chemical cleaner, open windows and let the room air out for at least an hour before spending time there.

Can I use a regular vacuum with a HEPA filter on mold?

No. Even HEPA vacuums should not be used on visible mold because the act of vacuuming disturbs spores and spreads them. HEPA vacuums are useful for cleaning up after mold has been removed and the area is dry, but only then. Never vacuum active mold.