I used to do two different ones - both very simple and no lysol or other stuff that seem to get added; 5 parts distilled water to 1 part isopropyl alcohol, and a few drops of Iford Photo flo, or 10 parts distilled water to 1 part isopropyl alcohol, and a few drops of Photo flo. I started out with the first, but gradually moved to the second as it didn’t seem to make any odds as far as cleaning was concerned but I felt the less Isopropyl alcohol the better.