My formula is 2 cups water to 1/2 cup isopropyl alcohol with a few drops of Dawn dish detergent. Best if water is distilled. Alcohol at 92%. You can put it in a dropper type container or a spray bottle.
It's still available on amazon.
http://www.amazon.com/s/ref=nb_sb_ss_sc_1_11?url=search-alias%3Daps&field-keywords=discwasher+fluid&sprefix=disc+washer%2Caps%2C209