Why Rooms Smell Stale, and Natural Ways to Freshen Them

A home that smells fresh feels cleaner and more welcoming, but sprays and scented candles only cover odors for a while, and many add their own chemicals and fine particles to indoor air. Lasting freshness comes from finding where smells start and dealing with the source. Each room has its usual culprits, so the most effective approach is to look at them one at a time and use simple, natural fixes.

The kitchen

Common sources: the trash can, the drain, the dishwasher filter, old sponges and dishcloths, the refrigerator and cooking smells that linger in fabrics.

What helps: empty the trash often, and wash the bin itself every few weeks, sprinkling a little baking soda in the bottom to absorb odors. Clean the dishwasher filter, which traps food scraps, according to the manufacturer's instructions. Replace sponges regularly and wash dishcloths in hot water. Keep an open box of baking soda in the fridge and wipe up spills promptly. Run the range hood while cooking and for several minutes afterward, especially when frying fish or other strong-smelling foods.

A natural scent: a simmer pot of water with citrus peels, cinnamon sticks, cloves or fresh herbs on low heat gives a pleasant aroma. Never leave it unattended, and top up the water so it doesn't boil dry.

The bathroom

Common sources: damp towels, mildew in grout and shower curtains, drains and humidity.

What helps: run the exhaust fan during and for at least 20 minutes after showers, or open a window. Hang towels to dry fully and wash them regularly. Wash fabric shower curtains and liners, and clean grout with a baking soda paste to remove mildew. Flush drains with hot water, and remove hair from drain covers.

The laundry area

Common sources: front-loading washing machines, which can trap moisture in the door seal, and damp laundry left too long.

What helps: leave the washer door open between loads so it can dry, wipe the rubber seal, and run a cleaning cycle according to the manufacturer's instructions. Move clothes to the dryer or line promptly. Clean the lint filter after every dryer load.

Bedrooms

Common sources: bedding, mattresses, closets and worn clothes left on chairs.

What helps: wash sheets weekly and pillows and duvets regularly according to their care labels. Sprinkle baking soda on the mattress when changing sheets, leave it for an hour or so, then vacuum it off. Air out rooms by opening windows when the weather allows. Keep closets uncluttered so air can circulate, and use cedar blocks or small cloth bags of dried lavender to freshen drawers.

Living areas

Common sources: upholstery, carpets, curtains and rugs, which absorb cooking, smoke and pet odors.

What helps: vacuum regularly, including under cushions. Sprinkle baking soda on carpets and fabric furniture, leave it for at least 15 minutes and vacuum thoroughly. Wash cushion covers and curtains according to their labels. Indoor plants add a pleasant, green atmosphere, though they have little measurable effect on odors.

Pets

Common sources: bedding, litter boxes, toys and accidents.

What helps: wash pet bedding and soft toys regularly, scoop litter boxes daily and change litter fully on a regular schedule. Clean accidents with an enzyme cleaner, which breaks down the compounds that cause lingering smells. Use caution with essential oils around pets. Several oils, including tea tree, eucalyptus and citrus oils, can be toxic to cats and dogs, whether diffused or applied to surfaces, so check with a vet before using them.

The entryway

Common sources: shoes, sports gear and damp coats.

What helps: let shoes dry in a ventilated spot and place a little baking soda inside smelly ones overnight. Wash sports kit promptly instead of leaving it in bags.

Cars and garages

Garages often store bins, sports gear, paint and fuel, all of which can send smells into the house through connecting doors. Keep containers tightly sealed, store chemicals away from living spaces, and move trash bins away from the door. A small bowl of baking soda or activated charcoal in an enclosed garage or car can absorb lingering odors between cleanings.

Whole-house habits

Ventilate daily: opening windows for even ten minutes, when outdoor air is clean, refreshes the air throughout the house.
Control humidity: keeping indoor humidity roughly between 30 and 50 percent discourages mold and musty smells. A dehumidifier helps in basements.
Change filters: replace heating and cooling system filters as the manufacturer recommends.
Find persistent smells: a musty smell that won't go away can signal hidden mold or a leak, and a sewage smell can mean a dry drain trap or plumbing problem. A rotten-egg smell could indicate a gas leak. Leave immediately and call your gas company or emergency services from outside.

Natural fragrance, used lightly

Once sources are dealt with, a little natural scent can add warmth: fresh flowers, herbs on a windowsill, dried citrus peels or a bowl of coffee beans. Beeswax or soy candles can add ambiance, but all candles produce some smoke, so burn them in ventilated rooms and never leave them unattended. The freshest-smelling homes usually smell of very little at all.