Stubborn stains are washed out either the second time or not at all. In this case, you can throw the item away or try one or another folk method.
One way or another, the item can still be considered spoiled, and if you are going to throw it away, then test one of these products - maybe it will work.
Mix washing powder (4 tbsp), stain remover (2 tbsp), laundry soap (half of a grated bar or 2 tbsp) and add 2 tablespoons of vegetable oil.
Pour 5 liters of boiling water over the ingredients, stir, soak the laundry in the solution and cover with cling film on top.
After 3-4 hours, wash the laundry in a washing machine with washing powder or gel.
Mix baking soda (3 tsp) with dishwashing liquid (1 tbsp).
Wet the stains, apply the paste to them, and wash in the washing machine after two hours.
100 grams of citric acid should be dissolved in 2 liters of warm water. Soak the items in the solution for 2 hours, then wash with powder.
Earlier we told you how much powder you can add to your washing machine without causing harm.