You've probably heard it's best to wash your hands with soap and hot water, but it may now be just as effective to use cold water.

According to a recent article on BBC News, a study was done where 20 people washed their hands 20 times with water at 59 degrees Fahrenheit, 79 degrees Fahrenheit or 100 degrees Fahrenheit. Study participants used different amounts of soap, and their hands were covered in harmless bugs.

The article states, "Researchers say there was no difference in the amount of bugs removed as the temperature of the water or the amount of soap changed."

Only a small group of people was tested for this study, so more research may need to be done on this. But it does lead to the thought that using cold water instead of hot water to kill germs could reduce electricity bills.

So whether you use hot or cold water, just make sure to wash your hands thoroughly with soap.