Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep a rabbit cage clean [title] Clean bowls and water bottles every day. [step] Clean them with hot water, avoid washing-up liquid. Germs and algae quickly grow in stagnant water.

Ending1: You could use either dish detergent or soapy water to clean bowls and water bottles. [substeps] Clean water bottles regularly, as they collect water and replace its shelf life. Ending2: Make sure that the nipple of the bottle works and that it is not blocked with dirt. Bugs can leave their feces in the food bowl if there are pieces of pellets left. Ending3: Clean them in hot water and soap every day. [substeps] Use a hamster pen dampened with animal urine if a cage or hutch air dry. Ending4: Keeping a clean cage makes it very safer for your rabbit. Use warm water, soapy detergent, and soft towels to clean (and dry) the bowls and water bottle.

Answer format: ending1/ending2/ending3/ending4