Showing moisture detected while charging?

@mohammedra73133 making the assumption that you have already checked, cleaned and tried your USB port and the message still shows. Most common issue for this is a bad charging board sensor. Replacing the charging board should fix this. Since iFixit doesn't yet have a guide for this, use something like this video for the repair. The board is available at plenty of online stores. Just make sure you order one for the exact version of your phone.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.