To remove a set-in stain, pour vinegar over the stain, and rub the stain with a vinegar and baking soda paste. You need vinegar, baking soda, a bowl, a measuring spoon and a rag.
- Make a vinegar and baking soda paste
Pour a small amount of baking soda into a bowl. Measure a few tablespoons of vinegar, and pour them over the baking soda. Stir the mixture with the measuring spoon, and turn the mixture into a paste.
- Pour vinegar over the stain
Pour vinegar over the stain until the stain is soaked.
- Rub the paste into the stain
Dab a bit of the paste on a clean rag, and rub the paste into the affected area until the stain comes out.