GB2488HSU IIyama random weird spot issue.

Hi. My monitor is GB2488HSU IIyama. Sometimes i can see on screen weird little spot,screens:

Not my screens,but the same:





But this doesnt look like bad pixel. More like smudge or something. Also this doesnt appear always. Sometimes is visible,sometimes not. Any ideas?


From the other angle it looks like this:




Also why sometimes i can see this and sometimes not? Any explanation?


Also why sometimes i can see this and sometimes not? Any explanation? Its hard to describe. For me its not dead pixel,because from other angle it looks white. From second angle looks like black smudge. Any ideas? And sometimes when i turn on monitor that "thing" is gone,sometimes its visible. I cant understand what can it be. THanks !

 

I had what I thought were stuck pixels, that I initially thought wasn't dirt as a dry cloth didn't remove them. I then used a damp microfibre cloth and gave the screen a thorough light rubbing & they disappeared - I was almost gonna RMA my monitor!

Sometimes dirt and/or stuck pixels will only show on certain coloured backgrounds.

 

When i am very close to monitor it looks like this ( like smudge or something? ):




But when i go rest to bed ( few meters away ) it looks like this from distance:





And of course sometimes it dissapear completely. One day it dissapear,other day i can this "thing". Any ideas why it is randomly?

 

Well, if you've not done so already, have a go at cleaning the screen thoroughly with a damp microfibre cloth - that's what I did and it got rid of what I thought were stuck pixels.

 

SO today is third day without that "thing" on screen. Also still rma monitor or not? What if this show again or not?Thanks for opinion.