Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to use a spray bottle on a cat for training [title] Fill a new spray bottle with plain water. [step] It is important to purchase a brand new spray bottle to use for spray bottle training. Do not just rinse out an old cleaning solution bottle.

Ending1: You will need to fill it with the proper amount of water so the water can run down the sides of the bottle. [substeps] Be careful not to fill the bottle more than halfway up the neck of the bottle. Ending2: Instead, mix a gallon of water with a gallon of chlorine bleach (the bleach helps disinfect surfaces) and mix this with a gallon of water. [title] Spray the spray bottle liberally with the disinfectant solution. Ending3: Otherwise, you could be spraying dangerous chemicals onto your cat. [substeps] Fill up the bottle with plain cold or room temperature water. Ending4: Do not fill that bottle with water immediately after emptying or replacing the nozzle. Instead, fill it with 2 to 3 gallons (3.9 to 9.1 l) of plain water.

Answer format: ending1/ending2/ending3/ending4