Even you're not one of the 46 million Americans* who plans to dine out while shopping this holiday weekend, you'll probably eat out at least once this holiday season. A restaurant may looks spotless but there are plenty of hidden germs lurking in unexpected places, according to University of Arizona-Tucson Professor and Microbiologist Charles Gerba (aka Dr. Germ). Here, his guide to the germiest contamination zones to watch out for in restaurants.