I've always wondered why Apple doesn't make those, and some cleaning spray too: the screens they make are really sensitive, and expensive, and I bet people often leave unexpected marks on them by trying to clean up
I know about this: I used the recall once on a 2014 mbp, but maybe should twice now since the replacement screen shows some signs too after a few years...
Just yet another defect they won't admit to publicly or do a recall over. You have to find out about the secret recall, before it's discontinued...