Rear screen weird mark

Hi all, I've got this weird mark in my rear screen and curbside rear window. Looks like the glass has lost its bond?

Anything that can be done? Heat gun? Tints?

Appreciate all your replies. Thanks

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It'll be where the aftermarket tint hasn't stuck properly on the dotted part of the window.
 
They all do that AFAIK, even the rear quarter windows. Renault build quality I suppose.
 
I'm not sure in all honesty as I had the factory tinted windows on my 197 but could still see white marks. Then again the factory tints weren't very dark.
 
The forum on Facebook discussed this the other day and it seemed to be common on cars about 2007 age, mine included!