All you need to do is take a pair of white socks, soak them in water and rub them with laundry soap, especially in the areas where there is the most dirt and where bleaching is needed.
I recently tried a genius trick that allowed me to avoid washing and bleaching my white socks. Now, it only takes me two minutes to make them bright white, like they were just store-bought.
All you need to do is take a pair of white socks, soak them in water and rub them with laundry soap, especially in the areas where there is the most dirt and where bleaching is needed.