1. between 20 and 27 degrees celcius

2. don't spray water directly at the clones, I don't know why but I never did and they just rooted and grew fine.

3. Dunno what you mean by wilt (stupid forreigner I am)

4. It will grow root but it's best that the roots don't get any light in such a fragile state they're right now or going to be.

PS (Get your humidity over 80% and use PH6.0 water)