How does handwashing remove germs?

The CDC notes that soap and water worked into a lather trap and remove germs and chemicals from hands. Water is a vital component of handwashing, especially when it’s applied to hands before soap. Water helps develop a better lather than people will get when applying soap to dry hands. That’s important because a good lather forms pockets known as micelles that trap and remove germs from hands.

Why is it important to wash hands for 20 seconds?

Prior to the pandemic, many people likely had no idea that proper handwashing calls for washing hands for 20 seconds. So why so long? The CDC notes that studies have found that hands need to be scrubbed for 20 seconds in order to remove harmful germs. Washing for anything less than 20 seconds runs the risk of leaving germs on your hands.

Should I use antibacterial hand soap?

It might surprise some to learn that the CDC says antibacterial hand soap is not necessary for anyone outside of professional health care settings. Studies have found no added health benefit of using antibacterial soap as opposed to plain soap and water. So consumers should not fret if they can’t find any antibacterial hand soap on their next trip to the grocery store.

Should I use warm or cold water?

According to the CDC, when combined with soap, water removes the same amount of germs whether it’s warm or cold. Water’s role in handwashing is to help create a lather, and lathers can be created with hot or cold water.

When should I wash my hands?

Hands should be washed any time they are visibly dirty or greasy. The CDC also recommends washing hands:

• before, during and after preparing food

• before eating

• before and after caring for someone at home who is sick with vomiting or diarrhea

• before and after treating a cut or wound

• after using the toilet

• after changing diapers or cleaning up a child who has used the toilet

• after touching an animal, animal feed or animal waste

• after handling pet food or pet treats

• after touching garbage