Are you showering too much?
It looks like most of us are - and it could be making us sick, says new research.
A study from Columbia University says that washing too often can cause skin to dry and crack.
This can make your skin far more open to viral and bacterial microbes that in turn can make you sick.
So the theory is that need to allow your body's own enzymes to thrive in order to keep a healthy immune system that can fight infection.
And did you know that you didn't need to wash your hair that often either? Once every few weeks is the ideal.