You shouldnt worry so much, as long as she has something to hold onto at the top of the tank it'll be fine. Just mist her with water every evening and it should be fine. I've found that most of My Mantids have shed during the night so the evening seems the best time to do it. Good luck
What I sometimes do, is pull a leg off a cric, or open a waxworm or something, and then put it up to their mouth. Nearll aways works, and they eventually grasp the food, and munch it!
i have lost several due to crickets attacking during molt. so i also hold the feeder with tongs, put it to the mouth of the non-eater and i usually have success.