The Surprising Effects of Using High Temperatures for Handwashing

Handwashing is a crucial part of our daily routine, whether it’s washing our hands, clothes, or dishes. The temperature of the water we use for these tasks is often overlooked, but it can have surprising effects. While it’s commonly believed that using high temperatures can kill more germs and bacteria, the reality is more complex. This article will delve into the surprising effects of using high temperatures for handwashing.

The Science Behind Handwashing

Handwashing is a simple yet effective way to prevent the spread of diseases. It works by physically removing germs and bacteria from our hands. The soap we use doesn’t necessarily kill these microorganisms, but it makes them less able to stick to our skin, allowing them to be rinsed away with water.

Effects of High Temperatures on Handwashing

Many people believe that using hot water for handwashing is more effective at killing germs. However, research has shown that the temperature of the water doesn’t significantly affect the removal of bacteria. In fact, using very high temperatures can have several surprising effects.

1. Skin Damage

Using very hot water for handwashing can cause skin damage. High temperatures can strip away the skin’s natural oils, leading to dryness, irritation, and even burns. This can make the skin more susceptible to infections.

2. Environmental Impact

Heating water to high temperatures consumes more energy, which can contribute to climate change. Moreover, hot water can cause more wear and tear on your washing machine or dishwasher, leading to more frequent replacements and higher environmental impact.

3. Ineffectiveness Against Certain Microorganisms

Some bacteria and viruses are not significantly affected by high temperatures. For example, the common cold virus can survive in temperatures up to 60°C. Therefore, using hot water for handwashing doesn’t guarantee that all germs will be removed.

Recommendations for Effective Handwashing

Given these surprising effects, what’s the best way to wash our hands? The World Health Organization recommends washing hands with soap and water for at least 20 seconds. The temperature of the water doesn’t need to be very high – comfortable warm water is sufficient. It’s also important to dry your hands thoroughly after washing, as germs can be transferred more easily to and from wet hands.

In conclusion, while it’s a common belief that using high temperatures for handwashing is more effective, the reality is that it can cause skin damage, have a higher environmental impact, and may not be more effective at removing certain microorganisms. Therefore, it’s recommended to use warm water and soap for handwashing, and to focus on the duration and technique of washing rather than the water temperature.