To extend the life of your lingerie, hand washing is BEST, and we recommend Soak Lingerie Wash.
Is hand-washing too fussy for you? Then use a gentle detergent like Soak in the machine on the delicate cycle in cold water. Hook your bras and secure them in a zipper net bag so they don't get tangled or snag one another.
Bras should be washed every 1-3 wearings. A day of rest in between wearing allows it to dry out and the elastics to shrink back to their intended shape. The more bras you have in your rotation, the longer each will last, and the less bra washing you will have to do!