Typically 48 hours, give or take, after the eyes clear up you'll see a shed. You really don't need to worry, it'll happen all on it's own. If you have a mister I'd mist the enclosure a bit, if you're worried about low humidity.

As for turning off the heating pad, no heat for bp is not good. You need to maintain the temps consistantly or you will end up with a respiratory infection. Run and grab a lamp dimmer, and a digital indoor/outdoor thermometer, if you're concerned about thermal burns.