This issue starts to annoy me too much, time is passing, I have been changing laptops and the problem persists (didn't have this issue with the old keyboards), therefore wondering if there are any accessories, covers that could help alleviate this problem.
For now, I am using a small piece of cloth but sometimes the lid doesn't close properly, it may not be the best solution but is by far less annoying to see keyboard marks in the display.
I am not an expert on fabrics but would like to know the names or properties to search for something thin and absorbent that could help also eventually to clean the display.
Any ideas, products, etc.?