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I don't know what you mean by alcohol 54.
There are a pair of common household alcohols, isopropyl and ethyl.
There is a third one methyl, but it is toxic and mostly used in industrial environments.
They are rated for the alcohol concentration level. Depending on the laws where you live, it can be anywhere from 70 to 96.
What kind of stain you are trying to remove? A damp cloth should be sufficient for most purposes. For my TV screen I use the common cleaner for the window panes- just make sure that it does not go in.
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