Air bubble on Audio 20 screen ?

[Wighty]

just noticed this bubble on the front of the screen , if I press it I can move it around slightly but it won't go away . It's a bit like the protective film on the front of your phone screen .
Has anyone seen this before , is there anything I can do with it ?
Is there a film I can pull off totally ?

 

[John Laidlaw]

I think that’ s the anti glare screen which is applied at factory Wighty , it’s not ‘supposed’ to be taken off but some folks have when it’s gotten damaged or more often been cleaned with something corrosive and reacted....