FWIW I had my 2018 for 34k miles and had to replace it once. Never again. My 2020 has over 20k miles now and has not required replacement. I think the key is not to hit the standing water at high speed. That's what did it for me in the first place. And no, I did not pay. The front shield ripped and they replaced both.
I'm pretty sure it doesn't melt when it gets wet. It may be felt-like, but it's still made from plastic. It's not like it's made from paper. As far as I can see, the people who have it fall of had it ripped out, not that it "melted".