How can you get rid of piccalilli stains?

To remove piccalilli stains, start by rinsing the stained area with cold water to dilute the vinegar and spices. Apply a stain remover or a mixture of liquid laundry detergent and water directly to the stain, letting it sit for about 10-15 minutes. Then, wash the fabric in the hottest water safe for the material. If the stain persists, repeat the process or consider using a stain-removal product specifically designed for difficult stains.