You can find rubbing alcohol at your local drugstore or pharmacy. Gently dab it on and let it sit for two minutes. Never rub anything into a pen stain, as rubbing may cause the stain to sink in and spread more. Always dab onto a stain instead. Apply pressure with your hand to encourage more of the ink to lift off the stained garment. Periodically check the cloth for ink to see if the rubbing alcohol is working. You should start to see some of the ink transferring from the stained garment onto the cloth. Make sure you've lifted all of the ink you can using the cloth. You can do this by hand in the sink with detergent or by using a machine. Once the garment’s been washed, check to see if the stain is gone. Keep trying to lift more and more of the ink off the garment using rubbing alcohol and a cloth. If the rubbing alcohol stops working, you may need to try a different method to remove the stain.

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Write a summary of the previous text in Vietnamese:
Sử dụng cồn isopropyl, còn được gọi là cồn tẩy rửa. Dùng khăn hoặc bông gòn chấm cồn tẩy rửa lên vết mực. Dùng khăn ướt chấm nhiều lần vào vết mực. Xả sạch quần áo bằng nước lạnh. Giặt trang phục bằng nước nóng. Lặp lại quy trình nếu vết mực vẫn còn.