If students encounter marks on the desk that cannot be wiped clean with correction fluid or oil-based pens, they can drop two drops of Wind Oil Essence and try wiping again. There will be unexpected results! In addition to "eliminating" marks, Wind Oil Essence can also "save" oil-based pens! If your oily pen doesn't produce water, you can try dropping two drops of hair oil essence on the tip of the pen. After it penetrates, you can continue to use it. Finally, I would like to remind everyone that correction fluid is a toxic substance and long-term use may lead to cancer! Don't use it, my friends! Suggest using correction tape instead of correction fluid~