Lately, I have having some problems with my negatives comming out with a strong purple tint. I am using Ilford Delta Pro 100 film and Sprint Systems Developer, Rapid Fixer (fresh fixer each time), and Hypo-clear. I pre-soak for about two minutes, develop according to the manufacturers guidelines, do a three minute stop-bath, fix for five minutes, rinse for a minute in water, give it three minutes in hypo-clear, and then do a final wash of five minutes in constantly flowing water. I have tried longer pre-soaks, longer fixing, longer time in the hypo-clear, and longer final washes but my negatives still come out purple. Does anyone know what I might be doing wrong?