Apple has updated a support document to state that customers shouldn't use hydrogen peroxide to clean its products, but added ethyl alcohol to the list of safe-to-use cleaning agents.

Don't use products containing bleach or hydrogen peroxide. Avoid getting moisture in any opening, and don't submerge your Apple product in any cleaning agents. Don't use on fabric or leather surfaces.

Michigan State University found that some apple growers resort to hydrogen peroxide to minimize the chances of fire blight pathogens entering their harvest after it has taken a severe hail beating.