Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean drains [title] Treat your drain with white vinegar, baking soda, and hot water. [step] This can help eliminate odors caused by the buildup of bacteria, grease, and organic residue in your drain. It can also help clean out residue to prevent a future clog.

Ending1: [substeps] Combine 1 part distilled white vinegar and 5 parts hot water. Add 2 tablespoons baking soda and stir to incorporate it into the water in your sink. Ending2: Pour ½ of a cup (118 ml) of baking soda down your drain, followed by ½ a cup (118 ml) of white vinegar. Cover or plug the drain immediately and let the mixture sit for about 15 minutes. Ending3: Boil water in a kettle or pot on stove. Add two cups of white vinegar and let it come to a rolling boil over low heat. Ending4: Mix 1 tablespoon (15 ml) of white vinegar and 1 cup (240 ml) of hot water into a spray bottle. Shake the bottle a few times and spray the mixture into clean areas around your drain.

Answer format: ending1/ending2/ending3/ending4