Question: To disinfect and clean a cat litter pan.
Option 0: Remove all litter and scrape off any litter or fecal matter that remains.  Using a mixture of 50/50 of bleach and water mixture douse the entire pan and scrub the inside with a plastic bristle brush then rinse and add water before filling with new litter.
Option 1: Remove all litter and scrape off any litter or fecal matter that remains.  Using a mixture of 50/50 of bleach and water mixture douse the entire pan and scrub the inside with a plastic bristle brush then rinse and let dry before filling with new litter.
Answer: 1