The reason for the appearance of moisture in the charging port

Me too. After much searching I believe the charging port is bad and needs to be replaced. Mine has had the moisture detection for a month now and I've tried everything like silica gel packets to logging out of and into my Samsung account (which seemed odd.) I even used a toothpick very gently and got dust out. I also tried a small empty brand new liquid container with a small diameter circle top that fir right into the charging port and blew it out for 10 minutes.

Now I am here to find a charging port to replace mine. Replacement units that are used or certified refurbished are going for $150-$190 on reselling sites. I believe this part is about $20 and you need an hour or so for replacement time depending on your skill level. I have replaced touchscreens, batteries, and buttons. I believe I could hopefully do this in about 45 minutes. If it works or not I'll try to come back here as you have already been waiting a while. -James