Handwashing with hot water: Does it work better?
What's the story
Handwashing is one of the most effective ways to prevent the spread of germs, but many people are confused about the role of water temperature in killing bacteria. Some believe that using hot water is a must to eliminate germs effectively. However, this article aims to clarify whether hot water actually kills bacteria on hands or if other factors are more important in hand hygiene.
#1
The science behind handwashing
Handwashing is all about removing dirt, bacteria, and viruses from the skin. The friction of scrubbing your hands with soap is what dislodges these pathogens. While hot water may feel more cleansing, it's not necessarily more effective at killing germs than warm or cold water. The key is to use soap and scrub for at least 20 seconds.
#2
Temperature vs. soap effectiveness
Soap works by breaking down oils and fats on your skin, which carry germs. It doesn't matter what temperature the water is; soap will still do its job. Studies have shown that using warm water is just as effective as hot water in removing bacteria when paired with proper scrubbing techniques.
#3
Skin sensitivity considerations
Hot water can be harsh on your skin, causing dryness or irritation over time. For people with sensitive skin or conditions like eczema, warm or cool water might be a better choice for comfort without compromising hygiene. The focus should be on thorough washing rather than extreme temperatures.
#4
Environmental impact of hot water use
Using hot water for handwashing also has environmental implications, as it increases energy consumption. Opting for cooler temperatures can help conserve energy while still maintaining effective hand hygiene practices. Being mindful of environmental impact alongside personal health considerations can guide better choices in daily routines.