No one will argue that washing your hands after you use the restroom is important. It's how you dry them that's up for debate.You've probably heard or read the reports from researchers at respected universities like Harvard and major medical schools all over the world. Researchers say hot air hand dryers can blow bacteria like fecal matter all over your hands. KPRC 2 Investigates had to test it to answer the question: To air dry or towel dry. Which is safer?