You'll already be aware there are tonnes of products to clean dirt and dust off your vinyl. However you'll also be aware that the older your vinyl gets the more unwanted crackles and pops appear regardless of how much you clean it. Some of this noise is caused by burning of your vinyl by your stylus, however ground in dust and dirt also causes noise.
After a lot of searching on the internet I came across this DIY vinyl wash fluid for restoration. The full article is still available at www.artsandmedia.com and it details a recipe to make up a vinyl cleaning fluid based on suggestions by a Laura Dearborn. I found this worked very well for me and restored some old records that can’t be replaced anymore due to being deleted. Please note, I do not take responsibility for any problems you encounter if you are to make up the fluid or use it incorrectly. This recipe was not created by me, I have tried it and it has worked for me so am offering this as a suggestion to restore your old vinyl. To make up the cleaning fluid use:
"- 3 parts distilled water (triple distilled, de-ionized)
- 1 part Isopropyl alcohol, 70% commonly available but 91% lab grade preferred.
- A few drops of photographic wetting agent – if possible Triton X-100, Triton X-110 or Triton X-115 or Monolan 2000, not Kodak Photoflo which is ‘reputed’ to leave a residue (though used by some). Recommended is 12 drops per gallon or 2-3 drops per litre, though some use up to 8 drops per litre. If you add too much, the fluid gets sudsy on the record.
Variants: Replace the wetting agent with washing up liquid or windscreen wash fluid (reputedly pure) or industrial glass cleaner e.g. Micro (a laboratory-glassware cleaner) or Liquinox"
Once you have made the fluid up, all you need to do is wash your records down with it using a lint free cloth, then rinse with pure distilled water to remove any residue. Then all you have to do is hang the vinyl up to dry with some string. This also works with time coded vinyl.