Sometimes its easier to apply the dye using a sharpened wooden toothpick. Make a solution of a drop of Photo-Flo to a couple of ounces of water. Dilute the dye with a few drops of this solution so that it is lighter than needed. The dye should be lighter than the surrounding area of the print so that several applications must be made. Allow the pick to soak in the diluted dye for a few minutes. When you remove the pick from the dye make sure there is no visual drop clinging to it. Hold the pick veritcal to the print and apply to the spot. Dip the pick in the dye for a moment and repeat. Keep doing this until the spot is no longer visible.