Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean an air mattress [title] Clean after every use. [step] It is ideal to clean your air mattress after every use. If that isn't possible, it good to clean it once a month.

Ending1: You can also throw your clothes away or use recycled cloths or paper towels as a cleaner. [substeps] If you notice a stain, wet a cloth with warm water and wipe it clean. Ending2: If your mattress is exposed to dangerous chemicals, put on a pair of protective gloves before you lift up the mattress. [substeps] Remove all the coverings from your mattress to ensure an easy clean. Ending3: At the very least, you should clean it once a season, depending on how often you use it. Clean the air mattress immediately if you see any mold or mildew build-up. Ending4: You can use regular detergent or a wet sponge or cloth. Make sure the mattress is clean before you begin working.

Answer format: ending1/ending2/ending3/ending4