Technical clothing designed to wick away moisture can help avid runners stay cool when they're moving, but they can be very difficult to clean. Over time, synthetic fibers can harbor odor-causing bacteria that normal laundering can't really get clean. One way to make sure frequently worn clothes (like workout gear) get clean is to pretreat them before washing. Fill a clean kitchen sink with water and 2 cups white vinegar, and soak the clothes. The natural acidity in vinegar will deodorize the clothes by killing the bacteria, all without ruining the fibers. Then launder your gear like normal for truly clean clothes.