How to effectively clean a yellowed shirt collar: discover grandma’s method

3. Baking soda
Baking soda is a very versatile product for cleaning the house. Here too, it may prove to be the winning secret ingredient.
To do this, pour the baking soda into a bowl with a splash of water. You must then mix everything well until you obtain a thick paste. Once this paste has been obtained, it must be spread on the shirt exactly on the areas to be cleaned and left to act for 15 minutes. However, if the result is not shiny, simply repeat the procedure described and machine wash as indicated on the garment label.
4. Standard detergents
First immerse the collar in water and apply a standard bleach. Then, using a toothbrush brush the stained spot and wait 30 minutes. Next leave the shirt in water for 30-60 minutes and finally wash it in the machine.
5. Marseille soap
Marseille soap is a powerful and very effective stain remover. To achieve the desired result, rub it on the wrists and collar, then between the fabrics. Leave on for at least 10 minutes, then wash as usual.
6. Peroxide
Mix 2 glasses of peroxide and a glass of washing-up liquid in a spray bottle. Apply the mixture on the stains and leave it for a few minutes in a dark place. In case of colorful clothes first test the impact of peroxide on a small invisible part of the clothes. The problem is that sometimes peroxide works as a bleach.
Finally wash it in the machine. If the stains are still there, repeat the procedure.