My case is very strange.
My cooling works fine.
When I got first melted cavity I used google and found that some little particles of sand could stick to screen and then be melted to it.
Since that case I started to clean my screen more friequently.
But then in a few days I have found another new cavity. I discovered it with magnifying and discovered that there are no any dust in this cavity. It was clean. Just like display surface cracled.
Once I discovered it I decided to check my guess.
My actions:
1. I cleared display with rag (black one with apple logo on it which I got with my macbook pro retina) very carefully so there was no any dust on it.
2. I cleared whole surface on which keyboard is located.
3. I closed my mac and connect to external display.
4. I loaded CPU for about 20 minutes with about 50% load.
5. I opened mac and discovered new cavity at TOP part! (as you know hottest part is bottom)
6. I touched surface of display near it and it was not hot.
7. I touched surface where keyboard is located near F1-F12 keys. It was about 104-122 F. I know that it could be much hotter with long loading.
Conclusion: I have defective surface of display.
Unfortunately I live in Ukraine and there is no Apple official stories. (I have bought my my in The USA)
But there is some service company which claims that they are authorised service provider http://a-service.in.ua/menus/view/172/remont-mac-book-pro-air/
I got to them and explained them my case.
They answered me that Apple would consider this case as cosmetic damage so there is no reason even to try.
I said that I am sure that we can reproduce it easily and got new melted cavity during research in laboratory.
To that argument they answered that I should ask Apple directly.
So now I am wondering how can I ask Apple directly? How can I prove that my mac gets new melted cavities each time I close it working.