Doctors are so smart most of them must've skipped a grade -- and that grade was probably kindergarten. How else can you explain the fact that they still haven't figured out how to wash their hands?

You learned to do it when you were five years old… yet up to 60 percent of doctors and nurses don't wash their hands when seeing patients in the hospital, even in the ICU.

It's so bad that researchers are running psychological experiments to see if there's any way to subconsciously boost hand-washing.

Researchers say putting a patient-focused message on the sink seems to awaken some kind of protective instinct in docs. In a series of tests at a North Carolina hospital, the phrase "Hand Hygiene Prevents Patients from Catching Diseases" led to 33 percent more soap usage than "Hand Hygiene Prevents You from Catching Diseases" or the control message "Gel In, Wash Out."

In a second set of tests, researchers actually watched doctors and nurses at the sink and found that the patient-focused
message produced 10 percent more hand-washing, according to the study in Psychological Science.

Ten percent increase? Big deal.

Diseases are spreading like wildfire in hospitals and medical clinics, and studies have shown that clean hands can dramatically reduce those infection rates -- saving time, money, and lives.

Any doc or nurse who won't do it isn't fit to wear the scrubs.