What should you clean headphones with?
Hydrogen peroxide will work, but you can also use diluted bleach or alcohol (63%), which is widely recommended to kill viruses. Try not to soak the paper towel or cotton ball, since alcohol is no friend to leather and plastic. Just use enough for a nice cleaning—no need to give your headphones a shower.
Can you use rubbing alcohol to clean headphones?
A cotton swab dampened with isopropyl alcohol, aka rubbing alcohol, will work, too, but don’t use too much. We say damp, not wet, as you don’t want the alcohol to get inside the earbuds. Don’t use anything stronger, like bleach or other household cleaning agents, since these could damage the earbuds, too.