1, use hand sanitizer. First, wash your hands with clean water; Then drop a proper amount of hand sanitizer on your hands; Then rub your hands repeatedly, and rub your hands up and down repeatedly until they are clean; Finally, rinse repeatedly with clear water.

2, white vinegar cleaning. Wash your hands and dry them first; Then take out a proper amount of white vinegar; Then drop an appropriate amount of white vinegar on the part with black spots on your hands; Wait for a period of time and gently rub the stained part with your hand; Finally, wipe it clean and wash it with clean water.

3, soapy water cleaning. Wet the dyed fingers first; Then apply soap to the dyed place and rub it a few times; Then rinse with clean water; Finally, if the effect is not obvious, you can clean it several times.

4, baking soda cleaning. Wash your hands repeatedly with diluted baking soda, and neutralize and decontaminate with acid and alkali.

5, fine sand mixed with washing powder water. Rub the sand back and forth with both hands, and use the friction of the sand to remove black matter.

6, wind oil cleaning. The essential balm is a good organic solvent, which can help to dissolve the dyed part of walnuts, and it has a good cleaning effect when applied to hands. Dip a cotton swab in an appropriate amount of essential balm and apply it to the dyed hands. Then rub your hands and let it stand for a while. Until you can clearly see that the color is lighter. Finally, clean with alcohol or gasoline.