I just picked up a great rat cage at a yardsale for $15 that will be perfect for my four incoming buff orp chicks. I want to get it good and clean, because I don't know what happened to the animal that lived in it previously. Is there any particular cleaner I should use, (or not use?). Should I use bleach and water- what's a good formula? Or does it not matter as long as I rinse it well?