Stubborn stains require pre-treatment. Dampen the stain with enough water and rub it generously with bile soap and let it soak for an hour. Then wash the skirt as usual. Use a damp cloth to distribute the soap. You can also use a special stain remover, but especially when it comes to children's clothes, we advise against using chemicals. If you have further questions about textile care, we recommend you click here to find out more.