Cleaning ‘staining’ off bottom of MacBook screen A couple months ago, I started to see some very small stain spots on the bottom of my MacBook Pro early 2015 screen. It's very annoying to see while I'm using it. When the screen is turned off, I see it as in the picture below. But when it's turned on, I see it as very small water-ish drops.
I tried to clean it using water, screen cleaner, and even alcohol, but it didn't go away.

Also that area doesn't feel as smooth as the unaffected area. So, I think it's on the outside of my screen not inside.

Have you ever seen this before? Any suggestions on how to remove it without the need of replacing the whole screen?
I've encountered something similar before and from the looks of it, the glass/plastic coating is etched.

A user once tried to clean their screen with acetone (nail polish remover) and it physically damaged the glass coating.  In the pre-Retina days, the glass was replaceable so it wasn't a costly fix.

Unfortunately, for the 2015 models, the glass and LCD are glued together so you will need to replace the entire assembly. 

IFixit.com has an excellent guide on replacing the display assembly.  It's not difficult, per se, it's time consuming and you must exercise a good bit of diligence (it's not something you going to speed through) when disconnecting the components as they can be damaged.  If this is not your cup of tea, have a pro do it for you.  Read the guide anyway, this way you know what to expect of the tech that does the work.