1, alcohol to clean, because the composition of alcohol for some stubborn stains have a high corrosive. If there is no alcohol, it can also make wind oil essence or white wine used at home, and the effect is not different.
2, shampoo + white vinegar = ballpoint pen printing elimination, wipe desks and chairs, pour a little shampoo, and then use a toothbrush dipped in white vinegar for scrubbing, ballpoint pen printing will disappear.
3, fresh milk or expired milk can also come in handy to clean the stains of desks and chairs.
4, get some oily hand cream or face oil to try, not to use toothpaste, generally the stains on the desks and chairs are mostly ballpoint pen prints, get a ballpoint pen print with toothpaste rub can go down.
