What type of orchid?
Assuming it's a phalaenopsis - "moth orchid" as they seem to be the most popular (two main leaves that are stiff like cardboard and glossy? Flowers on a long stalk that usually needs to be supported?)
These orchids tolerate shade, but not too much and flourish well in humid warm conditions eg bathrooms. If the aerial roots have all dried up that probably means you haven't been watering it regularly enough. A hand-mister is best and don't water in the evenings because that encourages mold/rot. Also, most orchids prefer rainwater or (at least) boiled kettle water that has been allowed to stand cold for a while.
I've just read back and seen that you said "soil" - if it's the orchid I've assumed it is then it should be in coarse bark or fibre, not soil.