What is the best was to restore a dingy, white bathing suit to its original pure white color?
It can be very difficult to keep an item white that picks up body soil and sunscreen that may also have a “hand wash in cold water” care label. If the swimsuit contains any spandex, then using a sodium hypochlorite based bleach like Clorox® Regular Bleach2 is out of the question.
To improve the appearance of your swimsuit, you can try an overnight presoak using powdered Clorox2® Stain Remover and Color Booster. Dissolve 1 scoop powder in 2 gallons of very hot water, fully submerge the suit in the soaking solution, and let it soak overnight. Use a dishwasher safe dinner plate to weigh it down if necessary so the suit is all way into the soaking solution. Let it soak for up to 8 hours or overnight, then pour off the soaking solution and wash the swimsuit in the hottest water recommended on the care label using detergent and more Clorox2®.