Cleaning routines ensure hygienic conditions for people and pets. Making homes inhospitable to pests is a sign of a good cleaning routine, but when insects start showing up, something is amiss. Small mistakes could be to blame for the sudden and persistent arrival of ants, flies, roaches, mice, and other unwelcome visitors.

Understanding the daily habits that invite pests can help people stop trouble in its tracks. Avoiding costly infestations, wood damage, and ongoing frustration can be as simple as making one small change to food storage, addressing leaks, or improving lighting. Experts say you can dramatically reduce pests by making small changes inside and outside your home.

• James Copley is the chief executive officer of Copley Pest Solutions in the UK.
• Greg McKendall is the owner of Kilter Termite and Pest Control in Southern California.
• Nicole Carpenter is the president of Black Pest Prevention in North Carolina.

1. Inadequate Food Storage

Crumbs and improper storage are common reasons why pests make themselves at home indoors. Kitchen habits that create reliable food sources attract unwanted insects and rodents.

“One of the main everyday habits that attracts pests is leaving food residue around the house,” explains James Copley, chief executive officer of Copley Pest Solutions. “People might not think much about leaving a crumb behind on the counter or on the floor, but to pests, that is now a food source that they will keep returning to.”

He says that ants are particularly crafty. They leave pheromone trails that signal other ants to follow them to the food source. “If you see one ant, you probably have more than you realize. Another pest that is attracted to the kitchen is the fruit fly. Having fresh fruit at home often attracts fruit flies, which are tricky to trap. Proper storage of your fresh fruit and discarding the fruit skin, peels, or cores in the garbage outside will help tremendously,” he says.

Don’t wait to throw away trash, run the garbage disposal, or wash dirty countertops. Food scraps, even in sinks, can quickly draw bugs and rodents. Use sealed glass or hard plastic containers to make open food bits less accessible to creepy crawlers.

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2. Clutter

Clutter hides nesting zones, where pests can thrive. Paper and storage materials, in particular, provide easy concealment.

Greg McKendall, owner of Kilter Termite and Pest Control in Southern California, says, “A cluttered home provides a lot of places for pests to hide and seek shelter when they’re not actively looking for food or water.” Reducing piles in the garage, attic, and basement can reduce the number of hiding spots for unwanted guests.

Remember to keep floors and corners clean, so that bugs can’t easily travel undetected around your home.

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3. Lax Landscaping and Plant Care

Outdoor habits can also cause trouble indoors. Littered lawns or edible plants too close to home structures—like porches, doorways, and window ledges—can unintentionally create rodent habitats.

“Overwatering your lawn and garden is another reason why some pest animals might be attracted to your home. Living things need water above all else, so having an abundance of it around your property from overwatering is practically extending an invitation to insects and rodents,” says McKendall.

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4. Accessible Entry Points

Nicole Carpenter, president of Black Pest Prevention, adds that everyday ventilation habits can also attract pests. Open doors and low-lying windows allow rodents to enter.

“Such a habit as opening exterior doors for ventilating the house is good in terms of air quality, but very risky in terms of pests, especially mice and rats,” she explains. “Small gaps and openings around the home are how rodents usually enter our homes, and an open exterior door, even if it’s just for a few minutes, is literally an invitation for them to investigate your home and check for food sources. It can be just one scout mouse getting inside, which is usually not a big problem if you get rid of it quickly and seal all entry points, but it can also be two or more, and it automatically means nesting and infestation.”

Instead, maintain secure structural barriers between the home and the outdoors. Remember that if your home is warmer than the outdoor temperature, pests may find it tempting and cozy to try their luck inside.

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5. Water Sources

Moisture causes all kinds of household problems. Mold and mildew aren’t all that moisture brings. Indoor and outdoor water sources can sustain insect populations and encourage rodents to thrive.

Copley says to watch out for drains or leaky faucets. “One simple fix is to dry the sink and shower after use. Do not leave behind wet sponges or towels and fix any leaks that you can see,” he says. “Drain flies are attracted to standing water and buildup in the sink, which can often happen with garbage disposals. Using a weekly mix of baking soda and vinegar will help clean your drains and ward off flies.”

Carpenter also warns that outdoor pooling after rainfall, unattended pet bowls, and dripping garden taps can also encourage cockroaches and rodents. Stay vigilant if any of these issues arise.

6. Uncovered Waste Bins

Waste management plays a crucial role in pest prevention. Trash cans or compost bins positioned near entryways can attract troublesome pests.

Carpenter says flies often gather around waste sources. Keeping trash bin lids tightly sealed and far from doors can help minimize the risk. Take the trash out every night. Also, use heavy-duty, lockable lids on outdoor bins.

“Anything that pests can eat or anything they can hide in should be at least 10–20 feet away from the home and garage,” she adds.

7. Lots of Light

Exterior lighting is a less obvious reason why bugs might find your home attractive. Constantly illuminated porch lights can attract flying bugs, which serve as a food source for spiders and small rodents. Instead of constant flood lighting, try motion-activated lighting. Of course, animals and bugs can hide in the dark, but the inconsistent lighting can make nesting near motion-sensored lights much less practical.