High purity isoprpopyl alcohol is really an ineffective or unnecessary cleaning agent with about 99% of dirty records and I have easy access to it along with ultrapure water with my wife being a researcher.
The best commercial record cleaning solutions have absolutely no alcohol in them and are followed by a high purity water rinse (usually a couple of rinses with high purity water as this is just as much of a "cleaning" step as the initial cleaning solution).
Alcohol is really only necessary and beneficial if you are dealing with a particularly "greasy" record to cut the grease and it doesn't happen very often.
DIY cleaning solutions are not worth the time or money invested. Buy a high quality commercial first stage cleaner (the AIVS 15 is very good, combining both surfactant/detergent and enzyme stages) and follow it with a high purity water rinse (the high purity waters available from the scientific supply houses are excellent and 1/8 the price of ultrapure from the record cleaner companies) and you will be set.
The best commercial record cleaning solutions have absolutely no alcohol in them and are followed by a high purity water rinse (usually a couple of rinses with high purity water as this is just as much of a "cleaning" step as the initial cleaning solution).
Alcohol is really only necessary and beneficial if you are dealing with a particularly "greasy" record to cut the grease and it doesn't happen very often.
DIY cleaning solutions are not worth the time or money invested. Buy a high quality commercial first stage cleaner (the AIVS 15 is very good, combining both surfactant/detergent and enzyme stages) and follow it with a high purity water rinse (the high purity waters available from the scientific supply houses are excellent and 1/8 the price of ultrapure from the record cleaner companies) and you will be set.