Permanent smudges on MacBook Air M2 screen
I bought my Macbook Air M2 chip last August 1, 2025. As I use the product, I noticed that there's a smudge at the upper right corner of the screen. I used microfiber cloth, but no effect. Now, I used damped microfiber cloth. Sometimes it disappears, but there are times that I can see the smudge, especially I am using dark mode. Can you please help me how to address this issue using home remedies? Thanks for helping.
[Re-Titled by Moderator]
Original Title: Permanent smudges
MacBook Air, macOS 26.0