IPad 8th Gen won't charge

I have an iPad 8th generation that was uncharged, so I plugged it in like always. When I checked it a few hours later it was still uncharged and nothing showed on the screen. I then noticed some blue powder on the lightning cable and looked at the spot where I had it. Little did I know that the lightning cable had been sitting in a small puddle of water on a plastic cabinet for I don't know how long and there was more of the blue powder in that spot. When I looked closely at the cable I could see that a few of the contacts appeared black instead of shiny. I don't see anything in the charging port on the iPad, but I also blew air into it with compressed air, used a clean toothbrush, and put a good cable in and out several times to try to "polish" the contacts. Is it possible that if there was moisture on the cable when I had it in the iPad charging I may have shorted out something in the device? What do you think might have happened?