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Water-based pen contamination to the clothes can be wiped with alcohol, alcohol can dissolve the ink composition in the water-based pen. You can also use gasoline to wipe, the composition of gasoline can effectively remove the residue of water-based pen on clothes. Baking soda and vinegar can also have a better cleaning effect. Sprinkle baking soda at the place where the handwriting is stained, and then pour white vinegar.