So basically i have an ipod nano that ive taken apart to replace its screen. Now i knew the ipod nano would have problems. Like when i put it into the computer it would be recognized sometimes and other times its screen would flash and it would make a *beep* sound. Now obviously this troubles me if im going to repair it, so i tried to look for the source of the problem by inspecting the logic board and i found these strange splotches (liquid made and it looks like it was spilt on it, i don't know where it came from)

SO i don't need help of how to take apart a nano, but how will you be able to clean this mess up without damaging the logic board!

I've heard alcohol works, but do i just slab it on all over or what; i need some advice