She should not use the crate as punishment, or the dog will resent the crate, and never want to go in. She should only say something to the dog if she catches her going on the floor, and that should be positive also, and get her outside. Positive reinforcement is the best. Every time she goes potty outside, she should be praised and/or treated. Kito had some kind of memory lapse in his potty training a few weeks ago, and all it took to get back on track was a little extra time outside, and keeping treats in my pocket--he's just like he was before!!