These are all good tricks for DIY with Zero skils…especially the vaseline one. the point is with the vaseline it is not permanant and needs re-doing every time you wipe your screen. If you put some more effort you can achieve perfect results.
I’ve repaired many monitors (among other things) using the following technique.
1. a DREMEL with a felt cone bit (not essensial but makes does the job so much quicker…in less than a minute).
2. Automotive Rubbing compound (toothpaste does the job too, but a lot slower! BRASSO is good too but you have to clean it very well.