Galaxy Note9: Does S Pen support the resistance of IP68 level?
Yes, S Pen is an IP68 Rated device. However, if there may be some remaining moisture around end of S-Pen after S Pen is exposed to water, you may feel stiff when pushing the end of S Pen. After exposing the S Pen into water, please wipe it with a dry cloth and dry it thoroughly before using or attaching it.
Additionally for faster drying, it will help that you hold the S Pen while end of S Pen is facing down and shake it smoothly a few times. Or,
dry S Pen thoroughly using cool wind. If you are still having trouble, please contact a Samsung Service Centre.
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