The coolant probably will. Depending on the size of the drop and the substance, it will either sublimate instantly, or freeze and then sublimate slowly as its orbit exposes it to the Sun. But that's just the big story. What about the fragments of the wall keeping the coolant there, do you think they disappeared? And the 'micrometeorite' even existing in LEO the first place shows that there is something wrong with that analysis. There are fragments in low earth orbit.