Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to wash a backpack [title] Empty your backpack. [step] You don't want to wash any items in your backpack that could be damaged by water. Turn your backpack inside out and use a small vacuum to clean the hard to reach interior corners of your backpack that might have small particles of dirt and garbage.

Ending1: [substeps] Listen to how to go about this as well. If you know to vacuum, you can get rid of any large particles which could keep your backpack dirty. Ending2: To clean the inside of your backpack : [substeps] Have a friend help you with this portion of the process. You'll probably have no problem cleaning a backpack with less mess then having to get a whole bag out and running around and doing laundry. Ending3: Once you are finished emptying your backpack, leave the pockets unzipped. [substeps] Set all of your belongings from inside the backpack in a plastic bag, so you can put it all back in after you clean your bag. Ending4: Keep the bag on while you clean it. [title] Blow on the bag to clean it.

Answer format: ending1/ending2/ending3/ending4