知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。Roll up a bit cotton ball and force it to the nib of the pen. Make an effort to force as much in the cotton ball as you can to the pen to ensure that it would not arrive unfastened any time you make an effort to utilize the stylus. [2] X Investigate