I have a 4 week old Netherlands Dwarf bunny and I'm having trouble potty training her. We got her a litterbox and she turned it into a bed, and won't go in it, not even with timothy hay in there. She uses just about the entire rest of the cage, not a specific corner. She loves to pee and poop on a wash cloth, but that gets disgusting really fast. She doesn't have a specific corner and we keep her cage pretty clean, so that's not the problem. She also poops all over the room when we let her out to play.

How can I get her to use one corner and one box? Any suggestions?