Quote Originally Posted by Kevin Kehler View Post
Les McLean advocated putting a capful of 99% isopropyl alcohol into the photoflow mixture to prevent drying marks. I have done it for years with great results. Just make sure you are not getting the cheaper 70% rubbing alcohol mixture as it contains several oils that will contaminate the water. Local drug store sells a bottle for $3-4 and it lasts years.
I learned this method from Les as well. 1 capful of alcohol, 1 drop of photo flo in a tupperware container of distilled water. I use the water over and over again, adding more photo flo and alcohol each session. My non-chemists mind tells me that the alcohol keeps boogers from growing in the photo flo-enriched water.