You don't need to get fancy — just regular bar or liquid soap is best, Dr. Patrick Neustatter, author of Managing Your Doctor, tells BuzzFeed Life. And if you can't get to a sink, hand sanitizers work, too. In hospital settings, they've been shown to be as effective as washing with soap and water, says Neustatter.
So lather up before you eat, after you use the bathroom, and basically any time you touch something questionable. And scrub all over for a good 20 seconds before rinsing off (or as long as it takes to sing the Happy Birthday song twice).