Reality check: Should you wash your hands in warm or cold water?

“It’s just important to make hand washing part of your everyday routine,” Culbert says. “It is probably the single most effective activity we have to reduce the spread of disease, especially during cold and flu season. And while for you it might not seem like it has a major impact, but for those people around you who may have compromised or weakened immune systems, it could make a big difference.”