Thunderbolt Display: What's happening with my monitor? (weird waves)

[VideoBeagle]

I have an Apple Thunderbolt Display connected to my M4 Pro mini, and I've noticed this wave pattern..it's not on the glass...It's not dead pixels..but something I don't know what it is so don't know what to search for.

It doesn't seem to be...static...like it's different now than when i took the photo...the bit on the right isn't as noticable..it all seems ..less.

 

[chrfr]

That looks like moisture got in there, but of course it’s hard to tell from a picture.

 

[Jonnod III]

One of my Thunderbolt Displays suffers from condensation on the glass inner when it starts up after a long break (It is stored in a place with no moisture control). It clears after a few hours of use, sometimes a day.

I've tried storing it in a bag with silica gel, but that didn't make any difference.