Hand washing is important – but keeping sinks clean is just as crucial as they may harbor dangerous bacteria, say scientists.

Following is a transcript of the video. Narrator: Germs are like cars. They are always on the move. And our hands? They're like one big freeway, moving germs toll-free from location to location ...

According to the CDC, frequent handwashing with soap and water for at least 20 seconds is essential in preventing infections.

In fact, Borwein warns that it's not even equally effective as an old-fashioned hand washing. "Soap and water is actually the best way to remove germs from the hands. Hand sanitizer is a good ...

This makes it extremely critical to understand how to wash hands and how often to wash them ... in reducing the transmission of harmful germs, including bacteria and viruses, which can cause ...