Live and learn:

With all the new technology in restroom hand driers, you might think blowers are more hygienic than a simple sheet of paper. Banish that thought, says Rodney Lee Thompson, a hospital epidemiologist at the Mayo Clinic in Rochester, Minn.

And how about this?

Even environmental concerns, Dr. Thompson says, are eradicated by the paper towel. “The electric blower uses more energy than making a paper towel,” he says.

Read Heidi Mitchell’s report at WSJ.com here or watch her short “Lunch Break” video after the ad here.