Hi all,
There is some consensus on the use of secondary alcohol ethoxylate - better known as Tergitol, a surfactant used in the production of various cleaners. Both the US Library of Congress and the National Library of Canada recommend its use for cleaning records. Though the formulations differ slighly, Tergitol is recommended because it has no known adverse effects.
You can read up on it here:
and here:
Both links are very informative and well worth the visit.
By the way, common alcohol of any kind is definitely not recommended for 78rpm records, as it will permanently damage them.
Glenn