Cleaning with ethyl spirit / rubbing alcohol

Greetings,
Just wanted to get some clarification on whether it is safe to use ethyl spirit/vodka/etc to clean the screen of Ipad 2 or iphone 4g.
I read that it can be harmful for the touch screen, and apple doesn't recommend it, but I just fail to see how. How can any alcohol damage the glass?
I don't care about the oleophobic coating.

Do NOT use any solvents on your iPad, including alcohol or window cleaner. From the manual:
To clean iPad, unplug all cables and turn off iPad (press and hold the Sleep/ Wake button, and then slide the onscreen slider). Then use a soft, slightly damp, lint-free cloth. Avoid getting moisture in openings. Don’t use window cleaners, household cleaners, aerosol sprays, solvents, alcohol, ammonia, or abrasives to clean iPad. iPad has an oleophobic coating on the screen; simply wipe the iPad screen with a soft, lint-free cloth to remove oil left by your hands. The ability of this coating to repel oil will diminish over time with normal usage, and rubbing the screen with an abrasive material will further diminish its effect and may scratch your screen.

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Hey,
No problems with my Droid 3 and the keyboard. I have not seen any posts in our forums with anyone having that problem either. Sometimes you might can take a Q-tip with a little rubbing alcohol on the tip and clean around the key in question and you might get lucky. If you think it is some type of defect, you might want to contact customer support and they can assist you with your problem. Good luck.
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http://img862.imageshack.us/img862/5332/zdjcie0433.jpg
http://img709.imageshack.us/img709/7718/zdjcie0438k.jpg
http://img203.imageshack.us/img203/9948/zdjcie0439a.jpg
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Cleaning with ethyl spirit / rubbing alcohol

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