Dirty Screen Effect On 75" TV - Fix?

[RobE968]

Our  75" TU8000 Crystal UHD 4K Smart TV (model  ua75tu8000wxxy), probably purchased in 2020, is beginning to show patches of Dirty Screen Effect.

Has anyone found a way to tune this out?

There are DSE/Grey Balance pages in Google and on YouTube but nothing that seems to offer a recovery process.

The software is up-to-date and a reset did nothing (except force us to scramble to discover our Netflix log-in).

Having a drive-in size screen is interesting but these smudges that show up when there are pale areas in the picture are annoying.

Suggestions  appreciated, thanks

[CasperAUS]

Sounds like you have screen burn?

[robmulally]

Do you have any photos of the issue and do you have original purchase receipts?