According to some recent research, most Americans wash their hands somewhere between 5 and 15 seconds.

In order to help prevent the spread of germs, you should be washing your hands for a full 20 seconds.

Twenty seconds doesn't sound all that long, does it?  It's probably a lot longer than you think.  Take this simple test to help determine whether or not you're washing your hands long enough.

Play the sound of running water in a sink below.  From the time it starts, to the time it stops is the actual amount of time you should be scrubbing your hands.

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The CDC recommends you sing "Happy Birthday" twice to help time your hand washing.

via UPI