When someone in your household has been sick, getting your home back to a germ-free state takes more than a quick wipe-down. Viruses and bacteria can linger on surfaces for hours to days, and some pathogens hang in the air long after symptoms have passed. A systematic approach targeting surfaces, air, textiles, and often-overlooked spots will dramatically cut the chances of the illness spreading to everyone else.
Disinfect, Don’t Just Clean
Cleaning with soap and water removes dirt and some germs, but it doesn’t kill viruses. Sanitizing kills bacteria but is not designed to kill viruses either. Disinfecting is the step that actually destroys both bacteria and viruses on hard surfaces. If someone in your home has had a stomach bug, cold, flu, or COVID, you need a product labeled as a disinfectant, not just a cleaner or sanitizer.
The most important detail people miss is contact time. A disinfectant only works if the surface stays wet for the duration listed on the label. Depending on the product, that ranges from 10 seconds to 10 minutes or more. A quick spray-and-wipe may leave the surface looking clean while the virus is still alive. Spray generously, let it sit for the full contact time, then wipe.
Which Disinfectants Actually Work
For most respiratory and stomach viruses, a simple bleach solution is one of the most effective and cheapest options. The CDC recommends mixing 5 tablespoons (one-third cup) of household bleach per gallon of room temperature water, or 4 teaspoons per quart. Let this solution sit on surfaces for at least one minute, though for tougher pathogens like norovirus you should leave it for at least five minutes.
Hydrogen peroxide-based disinfectants are another strong option, with some formulations needing only 30 seconds of contact time. Quaternary ammonium products (the active ingredient in many spray disinfectants and wipes) typically require 5 to 15 minutes of wet contact. If you’re dealing with norovirus specifically, be aware that most disinfecting wipes and alcohol-based products have not been proven effective against it. Bleach is your best bet for stomach bugs.
Focus on High-Touch Surfaces
You don’t need to disinfect every wall and floor. Concentrate your effort on the surfaces people touch repeatedly throughout the day: doorknobs, light switches, countertops, faucet handles, toilet flush levers, refrigerator handles, remote controls, phones, and cabinet pulls. These are the surfaces where germs transfer from hands to the next person who touches them. Disinfect these at least once daily while someone is actively sick, and do a thorough pass after they’ve recovered.
The bathroom used by the sick person deserves the most attention. Wipe down the toilet seat, handle, and surrounding area, the sink faucet, and any shared soap dispensers. If possible, designate one bathroom for the sick person and keep others using a different one.
Get Fresh Air Moving Through
Many common illnesses spread through tiny airborne particles that float in stagnant indoor air. Ventilation is one of the most effective and overlooked ways to clear a home of lingering germs. The CDC recommends aiming for at least 5 air changes per hour to meaningfully reduce the concentration of viral particles in a space. A Lancet Commission report rates 4 air changes per hour as “good,” 6 as “better,” and above 6 as “best.”
In practical terms, this means opening windows on opposite sides of the house to create cross-ventilation, running exhaust fans in bathrooms and kitchens, and turning your HVAC system fan to the “on” position rather than “auto” so it circulates air continuously. Even cracking a window in the sick person’s room makes a measurable difference, especially if you also keep the door closed and a fan pointed toward the window to push contaminated air outside.
Use a HEPA Air Purifier in the Right Room
A portable air purifier with a HEPA filter can help capture virus-carrying particles, but only if you choose the right size. The EPA recommends selecting a unit rated for the square footage of the room you’re using it in, and choosing one with a high Clean Air Delivery Rate (CADR) for smoke. The smoke CADR rating matters because smoke particles are closest in size to virus-laden respiratory droplets (in the 0.1 to 1 micrometer range). A unit rated for dust or pollen alone won’t filter viral particles as effectively.
Place the purifier in the room where the sick person is spending most of their time, and run it on the highest tolerable setting. This works best as a complement to ventilation, not a replacement for it.
Wash Bedding and Towels on Hot
Sheets, pillowcases, towels, and pajamas used by the sick person are loaded with germs. Washing at 140°F (60°C) followed by tumble drying is enough to eliminate the vast majority of pathogens. Research shows that a hot wash cycle alone reduces bacterial counts by 99.9% or more, and the heat of a dryer (which typically reaches above 200°F internally) knocks out another 99.9% on top of that. Skipping the dryer and air-drying is significantly less effective, as it can even allow certain bacteria to recolonize the fabric.
Don’t shake dirty laundry before putting it in the machine, since that can launch viral particles into the air. Carry it in a bag or basket directly to the washer, and wash your hands afterward. If the sick person’s laundry can’t be washed immediately, keep it in a separate bag away from other household laundry.
Dealing With Couches, Carpets, and Soft Surfaces
Porous surfaces like upholstered furniture, mattresses, and carpet are harder to disinfect than hard countertops. You can’t exactly soak your couch in bleach. For these surfaces, steam cleaning is the most reliable option. Heating a soft surface to 158°F for five minutes, or 212°F for one minute, effectively reduces pathogen counts. A handheld garment steamer or a steam-cleaning carpet machine can reach these temperatures.
There are also a small number of spray disinfectants specifically approved for use on porous materials. If you go this route, check the product label to confirm it’s rated for soft or porous surfaces, since most standard disinfectant sprays are only tested on hard, nonporous ones. For throw blankets, couch cushion covers, and anything else that’s machine-washable, pulling them off and running them through a hot wash cycle is simpler and more effective than spraying.
Special Steps for Stomach Bugs
Norovirus and similar stomach viruses are especially stubborn. They survive on surfaces for days, resist alcohol-based cleaners, and spread in incredibly small doses. If someone in your house has been vomiting or having diarrhea, standard disinfecting wipes are not enough.
Use a stronger bleach solution for cleanup: 5 to 25 tablespoons of household bleach per gallon of water, depending on how much organic matter is involved. Vomit and stool reduce bleach’s potency, so you need a stronger concentration when cleaning up after an accident. Remove any solid material first with disposable towels, apply the bleach solution, and let it sit for at least five minutes before wiping. Wear disposable gloves and wash your hands thoroughly with soap and water afterward. Alcohol-based hand sanitizers are not a reliable substitute for handwashing when norovirus is involved.
Replace the Small Things People Forget
Some items are easier to replace than disinfect. Toothbrushes used during the illness should be thrown out and replaced once the person recovers. Kitchen sponges that were used during the sick period should go in the trash. Hand towels in shared bathrooms should be swapped for clean ones daily while someone is ill. If you use bar soap, switch temporarily to a pump dispenser so people aren’t handling the same bar.
Stuffed animals, if a child has been sleeping with one while sick, can go through the washer and dryer on hot. Electronics like phones, tablets, and laptops that the sick person has been using can be wiped with a disinfectant wipe or a cloth dampened with 70% isopropyl alcohol. Let them air dry completely before use.