I'm trying to find a way to clean a cat litter box without using chemicals. I need to get the urine smell at least minimized if not gone completely... any answers?

Baking soda works pretty well.

I use the arm and Hammer litter. I scope it out everyday and completely change the litter once a week. Also when I change the litter I take the box outside and hose it down. I don't use any chemicals.

Baking soda or vinegar work well.

If you don't mind washing powder I bought an enzyme based one and mixed it with a little hot water to rinse out my rabbits litter trays.