We tested dozens of laundry detergents and found that Tide Ultra Oxi Powder and Tide Free & Gentle Liquid tackled the widest range of stains with ease. Back to top. Meet your guide.

Bringing detergent or soap with you is key to staying clean when traveling. But how can you bring liquid soap through TSA?

“The dirt and germs come off the clothes and go into the water,” Richardson, the author of the bestselling “Laundry Love,” explained. “They get trapped in the surfactant [compounds in detergent that ...