Updated March 22, 2026.

Strong smells usually fall into a few repeat categories: cooking odors, musty or moldy odors, smoke, pet odors, garbage or drain odors, and appliance odors. The fastest way to get results is to match the smell to the source and use the right DIY fix instead of trying to cover it up with fragrance. Some cleaners, scented products, and air fresheners can also add volatile organic compounds (VOCs) indoors, so source control usually works better than adding more fragrance. EPA: Volatile Organic Compounds’ Impact on Indoor Air Quality and EPA: Does EPA regulate VOCs in household products? are useful references here.

Most odor problems clear up faster when the first step matches the source.

Common Household Odors and Where to Start

  1. If your house smells like fish or old cooking grease, start with ventilation, degreasing, and soft-surface cleanup.
  2. If your house smells musty or moldy, look for moisture first and fix that before using any deodorizer.
  3. If your house smells like smoke, wash fabrics and surfaces, replace filters, and use particle filtration instead of perfume.
  4. If your house smells like pet urine or pet bedding, use an enzyme cleaner and clean the padding or fabric, not just the visible spot.
  5. If your house smells like garbage, drains, or a disposal, clean the container or drain source directly.
  6. If your fridge or freezer smells bad, remove spoiled food, wash shelves and bins, and use an odor absorber only after the source is gone.

How to DIY Remove Fish Smell or Cooking Smell From a House

Fish smell, fried-food smell, and stale grease smell usually linger in three places:

  1. Air.
  2. Hard kitchen surfaces.
  3. Soft surfaces like curtains, rugs, or chair cushions.

Start with this order:

  1. Open windows if outdoor air is clean and run the range hood.
  2. Wash grease off the stovetop, backsplash, cabinet fronts, counters, and trash can lid.
  3. Launder washable kitchen fabrics.
  4. Sprinkle baking soda on rugs or fabric surfaces, let it sit, then vacuum.

If the odor is still hanging around the next day, check the less obvious spots:

  1. The kitchen trash can.
  2. The sink drain or garbage disposal.
  3. The grease filter in the hood.
  4. Spills under the stove or fridge.

Cooking odors usually respond quickly because the source is often residue, not hidden damage.

How to DIY Remove Musty Smell or Mold Smell

A musty smell is usually a moisture warning, not just an odor problem. The current EPA guidance is straightforward: a moldy odor suggests mold growth and the key to mold control is moisture control. Helpful references: EPA: What does mold smell like? and EPA: Mold and Your Home.

If your home smells musty:

  1. Check under sinks, around toilets, near windows, around HVAC vents, in basements, and behind furniture on exterior walls.
  2. Dry wet areas quickly.
  3. Clean hard surfaces with detergent and water, then dry them completely.
  4. Replace porous materials that stay moldy or water-damaged.
  5. Run a dehumidifier if humidity is staying high.

Deodorizer alone will not solve this problem. If the moisture stays, the smell comes back.

How to DIY Remove Smoke Smell From a Room or House

Smoke smell behaves differently from cooking smell because it sticks to fabrics, dust, and fine particles. That means the best DIY approach is not just scent removal, but particle removal. Current EPA guidance: EPA: Wildfires and Indoor Air Quality and EPA: Learn About Wildfires and Indoor Air Quality.

If the smell is from fireplace smoke, candle smoke, or outdoor wildfire smoke:

  1. Wash bedding, curtains, removable covers, and washable fabrics.
  2. Damp-wipe hard surfaces instead of just dusting them.
  3. Vacuum floors and upholstery with good filtration.
  4. Replace or upgrade HVAC filters if they are dirty.
  5. Use a portable air cleaner that does not produce ozone. EPA: Air Cleaners and Air Filters in the Home and CARB: Air Cleaner Information for Consumers are good starting points if you are comparing units.

If smoke is still active outside, keep windows and doors closed and focus on filtered indoor air instead of cross-ventilation.

How to DIY Remove Pet Smell or Pet Urine Smell

Pet odors usually get worse when people clean the visible area but miss the padding, seams, or fabric underneath.

If the smell is from urine:

  1. Blot first. Do not scrub the spot deeper into the material.
  2. Use an enzyme cleaner made for pet odor.
  3. Let it dwell long enough to break down the residue.
  4. Repeat if the odor returns after drying.

If the smell is coming from carpet or upholstery generally:

  1. Wash removable covers and pet bedding.
  2. Vacuum thoroughly.
  3. Treat the odor source, not just the room.
  4. Clean litter boxes, crates, and pet-favorite corners on the same day.

If you are treating carpet stains, it also helps to read this related piece first:
Hydrogen Peroxide as a Carpet Cleaning Agent

How to DIY Remove Garbage Smell, Drain Smell, or Disposal Smell

These odors usually come from residue, trapped food, or moisture.

If the smell is coming from the trash:

  1. Empty the can completely.
  2. Wash the inside and lid.
  3. Dry it before putting in a new bag.
  4. Use a tighter-sealing bag or lid if the smell returns fast.

If the smell is coming from the sink drain or disposal:

  1. Clean the splash guard.
  2. Flush with hot water and dish soap.
  3. Remove visible food buildup.
  4. Clean surrounding surfaces where residue may have splashed.

If the smell is sour, sewer-like, or persistent, a simple surface cleaning may not solve it. That can signal a plumbing issue rather than a routine cleaning problem.

How to DIY Remove Fridge or Freezer Smell

Fridge smells often trace back to spoiled food, leaks, or forgotten containers.

If your refrigerator smells bad:

  1. Remove anything expired, leaking, or questionable.
  2. Wash shelves, drawers, and door bins.
  3. Wipe the interior walls and gasket.
  4. Dry everything before restocking.
  5. Use baking soda or activated charcoal only after the spoiled source is gone.

If the smell started after a power outage, use current food-safety guidance before keeping anything questionable: FoodSafety.gov: Three Ways to Keep Food Safe When You Lose Power.

How to Make a Simple DIY Air Freshener Spray

A homemade spray works best after the odor source has already been cleaned. It is a finishing step, not a substitute for removing grease, moisture, smoke residue, or pet messes.

A simple version is:

  1. 1 cup distilled water
  2. 1 tablespoon unscented witch hazel or vodka
  3. 10 to 20 drops of essential oil

Add everything to a clean spray bottle, shake before each use, and spray lightly into the air instead of soaking fabrics or finished surfaces. Citrus, lavender, and eucalyptus blends are common choices, but essential oils are still concentrated chemicals and should be used carefully. Poison Control: Essential oils is worth reading if children or pets are in the home.

DIY Odor-Removal Tools Worth Keeping Around

These are the basics that solve most home odor problems:

  1. Baking soda for temporary odor absorption.
  2. Activated charcoal for enclosed spaces.
  3. Enzyme cleaner for pet accidents.
  4. Degreasing cleaner for kitchen odors.
  5. Laundry detergent plus hot-water-safe fabric washing when appropriate.
  6. A HEPA-style vacuum or good filtration vacuum.
  7. A portable air cleaner for smoke or stale indoor air.

Air Freshener Safety and Regulations

If you use sprays, plug-ins, diffusers, or air cleaners for odor control, safety matters as much as scent.

  1. Follow product labels and keep flammables away from heat or open flame. Poison Control: Air fresheners covers ingestion, inhalation, and fire risks.
  2. Be careful with essential oils around children and pets. Store them out of reach and avoid treating them like harmless fragrance water. Poison Control: Essential oils is a good quick reference.
  3. Avoid ozone generators for home odor removal. The California Air Resources Board advises against in-home ozone generators, and indoor air cleaners sold in California must be CARB-certified and meet ozone-emission limits. CARB: Air Cleaner Information for Consumers.
  4. Low-VOC or no-VOC labels do not automatically mean a product is safer indoors. EPA: Does EPA regulate VOCs in household products? explains why those labels can be misleading in an indoor-air context.

Safety Rules for DIY Odor Removal

Do not create a bigger problem while trying to remove a smell. Current CDC guidance: CDC: Cleaning and Disinfecting with Bleach and CDC: Ammonia Fact Sheet.

Follow these rules:

  1. Never mix bleach with ammonia or other cleaners.
  2. Ventilate when using strong cleaning products.
  3. Wear gloves for mold cleanup, heavy cleaning, or harsh cleaners.
  4. Keep pets and kids away until cleaned areas are dry and safe.

When DIY Is Not Enough

DIY makes sense for cooking smells, pet accidents, trash odors, fridge odors, and light smoke residue.

Call a professional if:

  1. The smell comes back quickly after cleaning.
  2. You suspect hidden mold or ongoing water intrusion.
  3. The odor seems to come from HVAC, walls, flooring, or subflooring.
  4. Smoke damage is heavy.
  5. The smell is chemical, gas-like, or sewer-like.

For general indoor-air issues, the current EPA overview is useful here: EPA: Indoor Air Quality.

Three Product Picks for Stubborn Odors

  1. Blueair Blue Pure 311i Max for lingering airborne odors, especially smoke, cooking smells, and general stale-air problems. This is the best fit when the smell is hanging in the air instead of sitting in one obvious spill or surface.
  2. Fresh Wave Odor Removing Gel for ongoing odor control in bathrooms, basements, laundry spaces, and other rooms that benefit from passive, set-it-and-leave-it odor removal.
  3. Simple Green Pet Stain & Odor Remover for pet urine, vomit, bedding, and other organic odor sources that need direct surface treatment instead of an air-only product.