Hi, for older MBP bought 10+ years ago, I used iKlear bought from an Apple Store. It does not seem to be very effective in cleaning the screen of the MBP 16". Has Apple changed the screen coating since then? Is it a good idea to continue to use iKlear bought many years ago? What is the best way to clean it? Even my laptop bag is much bigger than the laptop, I see marks on the screen probably from the keyboards. I also need to remove fingerprints (yes, some people keeps touching my screen as if it were a touch screen) and saliva marks.