Stubborn stains on white socks require special treatment methods. Begin by immediately rinsing the stain with cold water and blotting away excess liquid. Use an appropriate stain remover for the type of stain and follow the manufacturer's instructions. Alternatively, you can try natural home remedies like a baking soda and water paste or a vinegar and water mixture. Let the product work for a few minutes and then wash the socks as usual. For stubborn stains, soaking the socks before washing is recommended.