How to use hand sanitizer correctly?

Effectiveness depends on the rubbing technique. Apply a 3 mL (hazelnut-sized) amount to dry palms and rub for 20–30 seconds, covering palms, backs of hands, between fingers, around nails, and wrists to ensure all surfaces are covered. Let it dry without wiping; the bactericidal effect is completed as it evaporates. Flammable—will ignite immediately in flames; avoid contact with the face and mucous membranes; not for children under 3 years of age; use mild soap under adult supervision if ingested, as it is toxic. When taking antibiotics or in cases of immune compromise, the gel is useful as a complement to hygiene practices to support the immune system.

How do you use hand sanitizer correctly?

Q: What is an antibacterial gel, and how does it work?

Hydroalcoholic hand rub (when soap and water are not available), containing 60–95% ethanol; the WHO recommends a minimum of 60% for virucidal and bactericidal effectiveness. Alcohol denatures the membranes and proteins of bacteria and enveloped viruses (influenza, respiratory viruses, and herpesviruses) in < 30 sec. Soap is superior for heavily soiled or greasy hands; alcohol is ineffective against Clostridium difficile spores, Cryptosporidium and Giardia parasites, and non-enveloped noroviruses. Quick hand rubbing is recommended for contact with a clean environment to prevent skin and mucous membrane infections; it offers broad-spectrum protection and is gentle on the skin with aloe and glycerin.

Q: Which antibacterial gel should you choose, and what is its environmental impact?

Choose one with ≥ 70% ethanol, free of banned endocrine disruptors like triclosan, and containing moisturizers such as glycerin and aloe vera to support the skin barrier; fragrance-free for sensitive and atopic skin. Professionals who use it frequently should alternate with soap to avoid alcohol-induced contact dermatitis. Environmental considerations: opt for refillable and biodegradable options that are benzalkonium-free and recyclable. Use it selectively to maintain the balance of the skin’s microbiome and natural barrier; excessive use does not strengthen the immune system or improve overall lifestyle hygiene.

What is an antibacterial gel, and how does it work?

Antibacterial gel, or hydroalcoholic gel, is a hand sanitizer designed for hand hygiene when soap and water are not available. It is composed of ethyl alcohol (ethanol) at a concentration between 60% and 95%—the minimum concentration recommended by the WHO for virucidal and bactericidal effectiveness is 60%. The alcohol works by denaturing the membrane proteins of bacteria and enveloped viruses (influenza, respiratory viruses, herpesviruses), causing their destruction in less than 30 seconds of active rubbing. Hydroalcoholic gels are available in the store’s line of disinfectants and antiseptics.

It is important to distinguish between hand sanitizer and washing with soap. Washing with soap and water remains superior in several situations:

Visibly soiled or greasy hands (alcohol is ineffective against organic residues)
Alcohol-resistant bacterial spores (Clostridium difficile) and parasites (Cryptosporidium, Giardia)
Non-enveloped viruses such as noroviruses, which are resistant to alcohol-based hand sanitizers

For all other situations—quick hand-to-hand contact in a clean environment, prevention of common skin and mucous membrane infections —antibacterial gel is a perfectly suited hygiene tool, with a broad spectrum of action and good skin tolerance thanks to the moisturizing agents (aloe vera, glycerin) included in modern formulations.

How do you use antibacterial gel correctly?

The gel’s effectiveness depends entirely on the rubbing technique. Apply a sufficient amount (about 3 mL, the equivalent of a generous pea-sized amount) to the palm of a dry hand, then rub both hands together for at least 20 to 30 seconds, covering all surfaces:

Palms and backs of the hands
Spaces between the fingers (fingers interlaced)
Around the nails (thumbs turned toward the opposite palm)
Wrists

Let it dry without wiping it off—the alcohol must complete its antibacterial action as it evaporates. A few important precautions: the gel is flammable and must be kept away from open flames immediately after application. It should not be applied to the face or mucous membranes. For children under 3 years of age, wash hands with mild soap under adult supervision—accidental ingestion of alcohol is toxic. If you are taking antibiotics or have a weakened immune system, the gel remains useful as a supplement to good general hygiene that supports the immune system.

Which antibacterial gel should you choose, and what is its environmental impact?

To choose an effective hydroalcoholic gel, check the following first:

Ethanol concentration ≥ 70% for optimal effectiveness against bacteria and enveloped viruses
No triclosan (an endocrine disruptor banned in many European formulations)
Moisturizing agents (glycerin, aloe vera extract) to protect the skin barrier with frequent use
Fragrance-free for sensitive or atopic skin

Healthcare professionals and frequent users should be sure to alternate with handwashing with soap to prevent contact dermatitis caused by repeated exposure to alcohol. From an environmental perspective, prioritize refillable bottles, biodegradable formulations free of persistent benzalkonium chloride, and recyclable plastic packaging. Use of the gel should be limited—excessive use can disrupt the skin microbiome, the body’s first natural barrier against infection, and does not strengthen the immune system, unlike a healthy lifestyle overall.