1, shampoo+white vinegar: soak the dirty place with shampoo, and then gently scrub it with a brush dipped in white vinegar;

2, alcohol+soap: use a brush to touch the alcohol brush. After the stain spreads, soak the clothes in cold water and wipe them with soap for cleaning;

3, toothpaste+a small amount of soap: first soak the stained place with cold water, then apply some toothpaste, rub a small amount of soap and gently rub;

4. Milk: Boil the milk, put a towel under the clothes, and rub a ball of cotton with hot milk on the ballpoint pen oil stain until the oil stain disappears;

5. Wipe the ballpoint pen oil stains with banana peel. In fact, there are some chemical methods to remove the ballpoint pen oil stains from clothes. For example, gently wiping with benzene, carbon tetrachloride or acetone can remove ballpoint pen oil stains from clothes.

I hope I can help you.