Getting rid of germs comes down to three basic strategies: washing them away, killing them with chemicals or heat, and filtering them out of the air. Most people already do some version of these things but miss key details that make the difference between actually eliminating germs and just spreading them around. Here’s what works, how to do it properly, and where most people fall short.
Cleaning, Sanitizing, and Disinfecting Are Different Things
These three words get used interchangeably, but they describe different levels of germ removal. Cleaning uses soap, water, and scrubbing to physically remove germs, dirt, and other impurities from a surface. It doesn’t kill germs. It washes them away. Sanitizing uses weaker chemical solutions to reduce germs to levels considered safe by public health standards. Disinfecting uses stronger chemicals that kill germs left on a surface.
The important thing to know: you need to clean before you sanitize or disinfect. Dirt, grease, and grime create a barrier that prevents chemical disinfectants from reaching the germs underneath. Spraying disinfectant on a visibly dirty countertop is largely a waste of product. Wipe the surface down with soap and water first, then apply your disinfectant.
Hand Washing Is Still the Single Best Defense
Your hands are the main vehicle germs use to travel from contaminated surfaces into your body. You touch your face, on average, dozens of times per hour, giving germs a direct route to your eyes, nose, and mouth. Washing your hands with plain soap and water is the most effective everyday thing you can do to break that chain.
The CDC recommends scrubbing for at least 20 seconds. That means lathering all surfaces of your hands, including between fingers and under nails, for longer than most people naturally wash. Scrubbing for 20 seconds removes more germs than shorter washes. The friction matters as much as the soap: you’re physically dislodging germs from the tiny crevices and folds of your skin. Antibacterial soap hasn’t been shown to outperform regular soap for everyday handwashing, so don’t worry about which type you grab.
The moments that matter most are before eating or preparing food, after using the bathroom, after blowing your nose or coughing, after touching garbage, and after being in public spaces where you’ve touched shared surfaces like door handles or shopping carts.
When to Use Hand Sanitizer
Hand sanitizer is your backup plan when soap and water aren’t available. For it to work, the alcohol concentration needs to be at least 60%. Sanitizers in the 60% to 95% alcohol range are significantly more effective at killing germs than those with lower concentrations or non-alcohol formulas. Check the label before you buy.
Apply enough to cover all surfaces of your hands and rub them together until they feel dry, which typically takes about 20 seconds. Sanitizer has real limitations, though. It doesn’t work well on visibly dirty or greasy hands because the grime prevents the alcohol from contacting the germs. It also doesn’t remove all types of germs. Certain stomach bugs and bacterial spores survive alcohol-based sanitizers, which is why soap and water remain the gold standard.
How to Actually Disinfect a Surface
The biggest mistake people make with disinfectant sprays and wipes is wiping them off too quickly. Every EPA-registered disinfectant has a specific contact time listed on its label, and the product needs to stay visibly wet on the surface for that entire duration to work. For some products, that’s 10 minutes or longer. If the surface dries before the contact time is up, you need to reapply.
This means a quick spritz-and-wipe with a disinfectant spray is often doing little more than cleaning. To actually kill germs, spray the surface generously after cleaning it, let the product sit for the time specified on the label, and only then wipe it dry or let it air dry. The directions for use section on the product label tells you exactly how long and for which specific germs the product is effective.
High-Touch Surfaces to Prioritize
You don’t need to disinfect every surface in your home. Focus on the spots that get touched most often by multiple people: light switches, door handles, faucet handles, toilet flush levers, remote controls, phone screens, and kitchen countertops. During cold and flu season, or when someone in the household is sick, disinfecting these surfaces once or twice a day makes a meaningful difference.
Killing Germs in Laundry
Regular laundry detergent removes many germs through the combination of soap and mechanical agitation, but it doesn’t reliably kill all of them, especially at lower water temperatures. The warm setting on your washing machine sits in an awkward middle ground: too hot to save energy, too cold to kill pathogens.
When someone in your household is sick, particularly with highly contagious illnesses like norovirus, wash contaminated bedding, towels, and clothing at 60°C (140°F). At that temperature, the heat combined with detergent effectively kills most common bacteria and viruses. For everyday loads where illness isn’t a concern, normal wash temperatures with detergent are generally sufficient. Using a hot dryer cycle adds another layer of germ killing through sustained heat. Don’t let wet laundry sit in the machine, as the warm, moist environment is ideal for bacterial growth.
Reducing Germs in the Air
Germs don’t just live on surfaces. Respiratory viruses, bacteria, and fungal spores float in indoor air, especially in poorly ventilated spaces. The simplest way to reduce airborne germs is opening windows. Even a few minutes of cross-ventilation dilutes the concentration of infectious particles in a room significantly.
For a more consistent approach, portable air purifiers with HEPA filters capture 99.97% of particles as small as 0.3 microns. That’s small enough to trap bacteria and many virus-carrying respiratory droplets. Place a HEPA purifier in rooms where people spend the most time or where a sick person is resting. Make sure the unit is rated for the room’s square footage, as an undersized purifier won’t cycle enough air to make a real difference.
UV-C light is another technology used in some air purification systems and has been employed in hospitals and commercial buildings for decades. Upper-room UV-C systems can effectively reduce airborne pathogens, but the UV energy can cause temporary eye and skin damage if improperly installed, and it fades wood surfaces and damages houseplants in the disinfection zone. Consumer UV-C wands and boxes vary widely in quality and effectiveness, so they’re generally less reliable than HEPA filtration for home use.
Kitchen and Bathroom Specifics
The kitchen harbors more germs than most people expect. Sponges and dish rags are among the most bacteria-dense objects in any home because they stay warm and damp for hours. Replace sponges frequently, at least every one to two weeks, and wring out dish rags and hang them to dry between uses. Cutting boards used for raw meat should be washed with hot, soapy water immediately after use, and using separate boards for raw meat and produce prevents cross-contamination.
In the bathroom, the toilet area is the obvious hotspot, but toothbrush holders, faucet handles, and bath mats collect significant bacterial loads too. Closing the toilet lid before flushing reduces the aerosol plume that sprays microscopic droplets onto nearby surfaces. Wash bath mats weekly in hot water, and let your bathroom ventilation fan run during and after showers to reduce the humidity that mold and bacteria thrive on.
What Doesn’t Work as Well as You’d Think
Vinegar is often promoted as a natural disinfectant, but it is not EPA-registered and doesn’t reliably kill many common pathogens, especially viruses. It’s a fine cleaning agent for cutting grease and removing mineral deposits, but it shouldn’t be your go-to if the goal is germ elimination during an illness.
Essential oils like tea tree oil have some antimicrobial properties in lab settings, but the concentrations used in household sprays and diffusers are far too low to meaningfully disinfect surfaces or air. Similarly, “antibacterial” products marketed for everyday cleaning rarely outperform standard soap and water for general germ removal. The extra chemicals add cost without adding much protection in typical household situations.