Still sad to think that white socks are a one-time thing? This is a common and gross mistake. It's just that you don't know about this easy, and most importantly, effective way of washing. Try to use it - and in the future you will wash white goods only this way.
School has started, and with it the season of white clothes. It should be washed delicately, but socks need not so much delicate care as proper washing.
Pour 1 liter of hot water (50-60 degrees) into a bowl, add 1 tbsp. l. soda, 2 tbsp. l. vinegar, 1 tbsp. l. table salt, 1 tbsp. l. dishwashing detergent.
Mix everything thoroughly and soak dirty socks in this solution for 2 hours. After that, all the dirt will come off by itself, no need to rub. Then rinse your socks and admire the snow-white creations.