Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to put earrings in [title] Smudge a cotton ball with rubbing alcohol. [step] It's very important to sanitize an piece of jewelry before you put it into your body. Even if you think that the earring is clean, there is still a chance that it might have picked up bacteria.

Ending1: Better to spend a minute cleaning the earrings than to risk a painful infection! [substeps] If you don't have a cotton ball, you can use a tissue, toilet paper, or any clean piece of cotton. The cleaning fabric should be able to absorb the rubbing alcohol. Ending2: Often, bacteria believe that the casing of a key is dirty, so scuff the inside of the assembly with rubbing alcohol to remove dirt from the surface. [substeps] If you don't have rubbing alcohol, you can buy a packaging sheet containing rubbing alcohol from a b&b. Ending3: Apply a little rubbing alcohol and a little water to a cotton ball and gently dab each grain of jewelry. Be careful not to rub the surface of the jewelry too harshly, or it will break the hard shell of your jewelry. Ending4: Microorganisms can easily work through the cotton ball, and even after wiping and rubbing with alcohol, you might still draw bacteria. If your jewelry is not completely clean, you may not be able to get your jewelry out of your body.

Answer format: ending1/ending2/ending3/ending4