Direct answer: remove old food, wash bowls regularly with a method suitable for their material, rinse thoroughly and refill with fresh food or water. Do not simply top up a dirty bowl.
Follow the material instructions
Check whether the bowl is dishwasher-safe and which temperatures or cleaners the maker permits. Ceramic with chips or cracks can be difficult to keep clean and should be replaced.
Keep a spare set
A second clean bowl prevents shortcuts while another is washing or drying. Use separate utensils from those handling raw pet food and clean surrounding mats after spills.
Notice appetite and drinking
A clean bowl supports monitoring. Sudden changes in eating or drinking need veterinary advice rather than a new bowl alone.
A practical furniture note: Kitty Buffet can support this routine where its current specifications suit your cat and room. Product furniture cannot diagnose or treat a health or behaviour problem.
