Wash longer. I'm not a big fan of extending the fix any longer than is necessary to remove the unexposed silver from the emulsion. Extending the wash will remove the dye.
If all else fails, the dye is stable and harmless. It's just visually annoying.
Jim MacKenzie - Regina, Saskatchewan, Canada
A bunch of Nikons; Feds, Zorkis and a Kiev; Pentax 67-II (inherited from my deceased father-in-law); Bronica SQ-A; and a nice Shen Hao 4x5 field camera with 3 decent lenses that needs to be taken outside more. Oh, and as of mid-2012, one of those bodies we don't talk about here.