Hand sanitizers effective, but handwashing is better

handwashing
Credit: CC0 Public Domain

Whether they dangle from keychains, spritz from pens or froth and pump out of clinic and classroom dispensers, hand sanitizers are convenient alternatives to handwashing, and they do work.

But when it comes to keeping germs away as we enter the cold and flu season, nothing beats a good scrubbing with soap and water.

Dr. Roland Newman II, a family medicine physician at Penn State Health, said being able to keep in your car, bookbag or desk makes staying healthy in the cold months easier than ever.

"For the , they are super convenient, and I think they do have a place in ," he said. They are also easier to use than ever. Some come pleasantly scented, while others add moisturizers to keep skin from drying out.

The trouble arises when users neglect traditional -washing in favor of the alcohol-based concoctions.

"Washing appropriately with soap and water can actually rid your hands of more germs and—depending on what you are coming in contact with—some chemicals," Newman said.

For times when skin is really dirty or laden with grimy material, only a real hand-washing will do.

Wet hands with water. Add soap. Cover all surfaces.

Most people know the basics. The key, Newman said, is to rub vigorously for about 20 seconds, or about how long it takes to sing "Happy Birthday" through twice or talk through the alphabet.

"What the soap does as you are scrubbing is release all the dirt and particles from the surface of the skin," he said. "They get bound up in the lather so when you rinse, all those germs and debris get washed away."

Cold, warm or hot—the temperature of the water doesn't matter. It's the length of time spent scrubbing and rinsing off appropriately that are key to a good hand-wash.

When that's not possible, turn to a with of 60 to 95 percent.

Newman cautions that because hand sanitizers are an alcohol-based product, they should be stored out of the reach of children and used by children only with adult supervision.

While the claims on most sanitizers saying that they kill 99% of bacteria and germs are true, Newman said some viruses can still sneak through: "Not all sanitizers are effective against norovirus and some health care-related bacteria."

Increased use of hand sanitizers has prompted some to question whether overuse can create problems with bacteria resistance. While it's a legitimate concern that is being studied and discussed, Newman said it comes up more with antibacterial soaps than with hand sanitizers.

"Sterility is not always better," he said. "Sometimes getting some exposure—as long as it's not life-threatening—can actually be adaptive and beneficial to our immune systems."


Explore further

Do hand sanitizers really work? And if so, how?

Citation: Hand sanitizers effective, but handwashing is better (2019, October 10) retrieved 19 October 2019 from https://medicalxpress.com/news/2019-10-sanitizers-effective-handwashing.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
11 shares

Feedback to editors

User comments

Oct 10, 2019
Soap, saponified fatty stuff, is a good mechanical cleaner that may take chemical contaminants and bacteria with it as it is rinsed off. The micelles trap oily and hydrophilic particles in bubble surface area to be rinsed away.

Waterless alcohol based sanitizers may take longer to rub dry to be effective sanitizer.

One must be thoughtful and mindful.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more