You will quickly see a bit of "haze" on the membrane when you put it back in, but you should be able to tell when it starts drying the whole membrane layer. A bit of a haze is ok, as long as it doesn't start to look leathery and tough. Hard to explain. Do the blood vessels look any smaller now than they did when you first broke into the shell? And I assume you still had activity when you re-moistened it? Talk to it, sing to it, if you haven't been doing so. Encourage it to be active.