Well I'm pleased to report my home-made record cleaning solution does a great job.
The formula (if anyone's interested) is around 75% distilled water (must be distilled - de-ionised still has some minerals left which may be harmful to the record), 25% isopropanol (99% or greater - DO NOT use rubbing alcohol, which is typically 75% Isopropanol (sometimes called Isopropyl alcohol), and a dash (a teaspoon or two) of a good wetting agent (use a horticultural one - if it won't harm plant roots, it's unlikely to have any of the harmful chemicals found in photographic wetting agent).
The wetting agent reduces the surface tension of the solution, which makes it easier to get into very small spaces (such as record grooves) and also helps reduce residue when the solution evaporates (which it will, due to the 25% pure alcohol).