>I have a totally different experience. I accidentally submerged my iPhone X in the sea as I got off a boat[1]
You were lucky and got it replaced under goodwill, as iPhone X has an IP67 rating[1] and specific about sea/salt water damage -- the kind you have described. Back home, you would have had to deal with a lot of grief[2].
[1] https://www.iphonehacks.com/2018/04/iphone-x-ip-67-water-res...