Midseason slump: The fabric is starting to sag and fade.
How to beat it: “Rotate your swim-suits,” says Ilene Sofferman of Canyon Beachwear, in New York City. “Spandex is a memory fabric and needs a day to recover its elasticity.” Look for a suit whose hang tag lists Xtra Life Lycra—it’s more resistant to stretching out than regular spandex. Rinse in cold water after each dip. Every 5 to 10 wears, machine-wash on the gentle cycle with a mild detergent, using a plastic lingerie case to protect the suit’s padding and underwire (try Berry Ball & Bag, $14, comforthouse.com). Air-dry out of direct sunlight.