The specific cleaning steps are as follows:
1. First, squeeze a proper amount of laundry detergent on the ink-stained area of pants.
2. Then squeeze a piece of toothpaste. The amount of toothpaste depends on the amount of ink.
3. Gently spread the toothpaste and laundry detergent evenly with your fingers, and then let it stand for 10 minute.
4. After standing for a period of time, wash the place stained with ink with both hands, which can be washed with water.
5. After a period of time, the places with ink on pants will be cleaned.