First things first. Get lingerie bags! Every person should have an arsenal of sizes and shapes to protect their favorite garments.
Indigo should be washed separately or with denim (boost the color in your favorite jeans). Put your indigo piece in the garment bag, wash as you usually. We prefer to wash warm or cold water.
Hang your freshly-washed piece to dry.
Once it’s dry, iron or steam on the wrong side.
We prefer to only wash indigo pieces two or three times a year, and always using the above method.