Wierd clouding / B-light bleed / mura effect

[Jenslyn87]

Hi everyone

I know this may not be the forum specifically for these questions, but I know there's a lot of helpful and knowing people in here so I'm gonna give it a shot!

Please move my thread if its not placed correctly - maybe offtopic?

I recently bought a samsung m87 together with a PS3 - primarily for blu-ray so I have chosen sides. People were friendly to help me get started in here with the blu-ray thing so I hope you will help a bit with the TV too!

I'm very pleased with my purchase except for one minor problem that's big to me - clouding!

The TV has what I believe to be clouding around the sides. The spots seem to change when I wipe the screen with a dry cloth because I heard that could help. Actually A couple of days ago I thought I was completely over it. When I went to bed, there was nothing to spot. Backlight 10, no power saving and colour warm 2 (which seems to bring it out). The next day nothing again. Then I played xbox for 10-20 minutes and there was the clouding again!

Is this normal clouding behavior or is it something else? Can I do anything or should I try to get a refund/a new set.

I know maybe it doesn't matter that much but it is visible when the background is black and I'm very neurotic about this stuff. Its almost like a disorder. I can't stop looking for it... so it bothers me a lot!

Hope you will help

thanks!