I have a 6 month old Dell u2311h IPS monitor. I have similar spots on my monitor except you can only see them when you spray the cleaning liquid on it. After I wipe it and it dries, you can't see the spots. Turning the monitor off and looking at the light glare reflection will not expose it. The only time I see them is right after a bunch of sprays directly onto the screen. Looks like acid was splashed on it or something.
I know I did not cause those spots because there are so many of them and I do not remember making such large splashes on my screen.
With the monitor dry and everything, i don't see any differences in image quality or the spots themselves. I can only conclude that its not caused by the liquid, but rather that the actual screen itself is like that. It probably was a defect that could be easily covered by the matte coating so it wouldn't be noticed too easily.
My screen cleaner is "monster screenclean" that I bought from futureshop. It works fine and everything and doesn't leave any streaks at all. I've used it on TVs too and the results were nice.