Hacking Problem with my Ds

[1upm4n]

I got a ds a couple days ago, and i bought some screen protectors. after i applied them, i noticed a bubble on my screen. i took them off. then a day later a mark showed up on my ds top screen. looks almost like a watermark its been dropped in water. it still works and everything except that small mark bugs me. any idea how to rid of it

 

[Reaper]

Did you try cleaning with a cleaning cloth?

 

[1upm4n]

yes i have. i have a special cloth for the ds