"Can Hand Sanitizer Kill Germs on Surfaces?"

In the wake of the COVID-19 pandemic, hand sanitizers have become a staple in our daily lives. But can these liquid lifesavers also work their magic on surfaces? Let's delve into the science behind hand sanitizers and explore their effectiveness on surfaces.

Understanding Hand Sanitizers

Hand sanitizers primarily contain alcohol, typically ethanol or isopropanol, which is the active ingredient that kills germs. The Centers for Disease Control and Prevention (CDC) recommends alcohol-based hand sanitizers with at least 60% alcohol to effectively eliminate many types of bacteria and viruses, including the coronavirus.

However, it's crucial to understand that hand sanitizers are designed to work on our hands, not surfaces. They are not registered with the Environmental Protection Agency (EPA) as disinfectants for surfaces. So, while they may kill some germs on surfaces, their effectiveness is not guaranteed, and they may not meet the EPA's criteria for surface disinfectants.

How Hand Sanitizers Work on Surfaces

When applied to surfaces, hand sanitizers can potentially kill some germs. However, their effectiveness depends on several factors:

• Surface type: Hand sanitizers may work better on non-porous surfaces like glass, stainless steel, or plastic than on porous surfaces like wood or fabric.
• Concentration: The higher the alcohol concentration, the more effective the sanitizer. However, concentrations above 60% may not provide a significant additional benefit and could increase the risk of skin irritation.
• Contact time: Like surface disinfectants, hand sanitizers need time to kill germs. The CDC recommends keeping your hands still for at least 20 seconds when using a hand sanitizer. On surfaces, the contact time required for hand sanitizers to work effectively is not well-established.

Moreover, hand sanitizers may not be as effective on surfaces contaminated with bodily fluids, as the alcohol can be inactivated by proteins and other substances present in these fluids.

Surface Disinfectants vs. Hand Sanitizers

Surface disinfectants are specifically designed to kill germs on surfaces. They are registered with the EPA and have been tested to meet their criteria for surface disinfectants. In contrast, hand sanitizers are not designed for this purpose and have not been tested for surface disinfection.

Surface disinfectants typically have a longer contact time than hand sanitizers, which allows them to kill a broader range of germs, including bacteria, viruses, and fungi. They are also more likely to be effective on porous surfaces and surfaces contaminated with bodily fluids.

When to Use Hand Sanitizers on Surfaces

While hand sanitizers are not the first line of defense against surface germs, there may be situations where they can be useful. For example, if you're out and about and need to clean your hands but don't have access to soap and water, using a hand sanitizer on a surface before touching it can help reduce the number of germs on your hands.

However, it's essential to remember that this is not a substitute for proper hand hygiene. Always wash your hands with soap and water when possible, and use hand sanitizers only when soap and water are not available.

How to Use Hand Sanitizers on Surfaces

If you decide to use a hand sanitizer on a surface, follow these steps:

1. Apply a small amount of hand sanitizer to the surface.
2. Rub the sanitizer over the entire surface, making sure to cover all areas where germs may be present.
3. Allow the sanitizer to remain on the surface for at least 20 seconds. This gives the alcohol time to kill any germs that may be present.
4. Wipe the surface clean with a clean cloth or paper towel.

Remember, this is not a guaranteed method for surface disinfection, and it's always best to use a registered surface disinfectant when possible.

Alternatives to Hand Sanitizers for Surface Disinfection

If you're looking for alternatives to hand sanitizers for surface disinfection, consider using products registered with the EPA as disinfectants. These products have been tested to meet the EPA's criteria for surface disinfectants and are more likely to be effective than hand sanitizers.

The CDC provides a list of EPA-registered disinfectants that are effective against the coronavirus on their website. You can also find this list on the EPA's website by searching for "List N: Disinfectants for Use Against SARS-CoV-2."

When using surface disinfectants, always follow the manufacturer's instructions for safe and effective use. This includes using the correct amount of product, allowing the disinfectant to remain on the surface for the recommended contact time, and properly disposing of any used materials.

In conclusion, while hand sanitizers can potentially kill some germs on surfaces, they are not designed for this purpose and may not be as effective as registered surface disinfectants. Always prioritize proper hand hygiene, and use surface disinfectants registered with the EPA for the best protection against germs.