That second picture looks like a big poop and some pee next to it. Urate is solid. Clean it up, no problem. The first picture looks like he's ready to shed. If you clean the cage now, just leave him alone for a week or until he sheds. Make sure the humidity is 60%-80%. If you have a screen top on a glass aquarium, put a wet washcloth on top to increase humidity. Cover that with a sheet of aluminum if it's still low. Spray as needed.